History.

As a frontier zone between nomadic pastoralists and sedentary farmers, Ningxia was a frequent seat of war and incursions by non-Chinese tribes. To pacify the region, the imperial government established military colonies to reclaim land. In addition, horse pasturages were founded under the Imperial Stud to safeguard the supply of army horses, as early as the Western Han dynasty (206 BCE – 9 CE). Ningxia and its surrounding areas were incorporated into the Qin dynasty as early as the 3rd century BC. Throughout the Han dynasty and the Tang dynasty there were several large cities established in the region. The Liang Province rebellion at the end of the Han Dynasty affected Ningxia.  By the 11th century the Tangut people had established the Western Xia dynasty on the outskirts of the then-Song dynasty. Jews also lived in Ningxia, as evidenced by the fact that in 1489, after a major flood destroyed Torah scrolls in Kaifeng, a replacement was sent to the Kaifeng Jews by the Ningbo and Ningxia Jewish communities.  It then came under Mongol domination after Genghis Khan conquered Yinchuan in the early 13th century. Muslims from Central Asia also began moving into Ningxia from the west. The Muslim Dungan Revolt of the 19th century affected Ningxia.  In 1914, Ningxia was merged with the province of Gansu. However, in 1928 it was detached from Gansu and became a separate province. Between 1914 and 1928, the Ma clique ruled the provinces of Qinghai, Ningxia and Gansu; General Ma Hongkui was the military governor of Ningxia and had absolute authority in the province. The Muslim conflict in Gansu, which lasted from 1927 to 1930, spilled over into Ningxia. In 1934, warlord and National Revolutionary Army general Sun Dianying attempted to conquer the province, but was defeated by an alliance led by the Ma clique.  From 1950 to 1958, a Kuomintang Islamic insurgency resulted in fighting throughout Northwest China, including Ningxia. In 1954, the Chinese government merged Ningxia with Gansu, but in 1958 Ningxia formally became an autonomous region of China. In 1969, Ningxia received a part of the Inner Mongolian Autonomous Region, but this area was returned in 1979.  A number of Chinese artifacts dating from the Tang dynasty and Song dynasty, some of which had been owned by Emperor Zhenzong, were excavated and then came into the hands of Ma Hongkui, who refused to publicize the findings. Among the artifacts were a white marble tablet from the Tang dynasty, gold nails, and bands made out of metal. It was not until after Ma died that his wife went to Taiwan in 1971 from America to bring the artifacts to Chiang Kai-shek, who turned them over to the Taipei National Palace Museum.

Geography.

Present-day Ningxia is one of the nation's smallest provincial-level units and borders the provinces of Shaanxi and Gansu and the Inner Mongolia Autonomous Region. At 3556 meters above sea level, Aobaogeda () in the Helan Mountains is the highest point in Ningxia.  Ningxia is a relatively dry, desert-like region and features a diverse geography of forested mountains and hills, table lands, deserts, flood plains and basins cut through by the Yellow River. The Ningxia ecosystem is one of the least studied regions in the world. Significant irrigation supports the growing of wolfberries, a commonly consumed fruit throughout the region. Ningxia's deserts include the Tengger desert in Shapotou.  The northern section, through which the Yellow River flows, supports the best agricultural land. A railroad, linking Lanzhou with Baotou, crosses the region. A highway has been built across the Yellow River at Yinchuan.  On 16 December 1920, the Haiyuan earthquake, 8.6 magnitude, at, initiated a series of landslides that killed an estimated 200,000 people. Over 600 large loess landslides created more than 40 new lakes.  In 2006, satellite images indicated that a 700 by 200-meter fenced area within Ningxia— southwest of Yinchuan, near the remote village of Huangyangtan—is a near-exact 1:500 scale terrain model reproduction of a 450 by 350-kilometer area of Aksai Chin bordering India, complete with mountains, valleys, lakes and hills. Its purpose is as yet unknown.

Grasslands.

It was reported that approximately 34 percent (33.85 million mu) of the region's total surface consisted of grassland. This figure is down from approximately 40 percent in the 1990s. The grasslands are spread over the dry desert-steppe area in the northeast (which forms a part of the Inner Mongolian steppe region), and the hilly pastures located on the semi-arid Loess Plateau in the south. It is ascertained that the grasslands of Ningxia have been degraded to various degrees. However, there is scientific debate as to what extent this degradation is taking place as measured in time and space. Historical research has also found limited evidence of expanding grassland degradation and desertification in Ningxia. A major component of land management in Ningxia is a ban on open grazing, which has been in place since 2003. The ecological and socio-economic effects of this Grazing Ban in relation to the grasslands and pastoralists’ livelihood are contested. The ban stipulates that animal husbandry be limited to enclosed pens and no open grazing be permitted in certain time periods set by the Autonomous Region's People's Government.

Mineral resources.

Ningxia is rich in mineral resources with proven deposits of 34 kinds of minerals, much of which located in grassland areas. In 2011 it was estimated that the potential value per capita of these resources accounted for 163.5 percent of the nation's average. Ningxia boasts verified coal reserves of over 30 billion tons, with an estimated reserve of more than 202 billion tons, ranking sixth nationwide. Coal deposits are spread over one-third of the total surface of Ningxia, and mined in four major fields in the Helan and Xiangshan mountains, Ningdong and Yuanzhou (or Guyuan). The region's reserves of oil and natural gas can be found in Yanchi and Lingwu County, and are ideal for large-scale development of oil, natural gas and chemical industries. Ningxia leads China in gypsum deposits, with a proven reserve of more than 4.5 billion tons, of which the rarely found, top-grade gypsum accounts for half of the total deposits. The Hejiakouzi deposit in Tongxin County features a reserve of 20 million tons of gypsum with a total thickness of 100 meters. There is a considerable deposit of quartz sandstone, of which 17 million tons have been ascertained. In addition, there are phosphorus, flint, copper, iron, barite, other minerals and Helan stone – a special clay stone.

Climate.

The region is from the sea and has a continental climate with average summer temperatures rising to in July and average winter temperatures dropping to between in January. Seasonal extreme temperatures can reach in summer and in winter. The diurnal temperature variation can reach above, especially in spring. Annual rainfall averages from, with more rain falling in the south of the region.

Governance.

The politics of Ningxia is structured in a dual party-government system like all other governing institutions in mainland China.  The Chairman of the Autonomous Region is the highest-ranking official in the People's Government of Ningxia. However, in the Autonomous Region's dual party-government governing system, the Chairman has less power than the Communist Party of China Ningxia Committee Secretary, colloquially termed the "Ningxia CPC Party Chief".  Ningxia has a friendship agreement with Sogn og Fjordane county of Norway.

Administrative divisions.

Ningxia is divided into five prefecture-level divisions: all prefecture-level cities:  The five prefecture-level cities of Ningxia are subdivided into 22 county-level divisions (9 districts, 2 county-level cities, and 11 counties).

Economy.

Rural Ningxia was for long an officially designated poverty area, and is still located on the lower rungs of the developmental ladder. It is the province with the third smallest GDP (Tibet being the last) in China, even though its neighbors, Inner Mongolia and Shaanxi, are among the strongest emerging provincial economies in the country. Its nominal GDP in 2011 was just 200.0 billion yuan (US$32.7 billion) and a per capita GDP of 21,470 yuan (US$3,143). It contributes 0.44% of the national economy.  Unlike several other underdeveloped provinces, labor costs in Ningxia are among the highest in China (ranking in the top third percentile), making it unattractive as a manufacturing center. Furthermore, Ningxia has yet to become a hub for consumption due to its low population.

Agriculture.

Similar to other areas, Ningxia has seen a gradual decline of its peasant population due to rural–urban migration. In spite of this, the great majority (62.8 percent) was still agricultural at the time of the survey. Animal husbandry is important for the regional economy. In the main pastoral county, Yanchi, it is even the leading industry when specified for the primary sector. The dominant grazing animals are sheep and goat. In the (semi-)pastoral regions, herders engage in a mixed sedentary farming operation of dryland agriculture and extensive animal husbandry, while full nomadic pastoralism is no longer practiced.  Ningxia is the principal region of China where wolfberries are grown. Other specialties of Ningxia are licorice, products made from Helan stone, fiddlehead and products made from sheepskin.  Ningxia wines are a promising area of development. The Chinese authorities have given approval to the development of the eastern base of the Helan Mountains as an area suitable for wine production. Several large Chinese wine companies including Changyu and Dynasty Wine have begun development in the western region of the province. Together they now own 20,000 acres of land for wine plantations and Dynasty has ploughed 100 million yuan into Ningxia. In addition, the major oil company China Petroleum and Chemical Corporation has founded a grape plantation near the Helan Mountains. The household appliance company Midea has also begun participating in Ningxia's wine industry. Vineyards have been set up in the region.

Industries and economic zones.

Yinchuan Economic and Technological Development Zone was established in 1992. Spanning, it has an annual economic output Rmb23.7 billion (25.1% up) (US$3.5 billion). Major investors are mainly local enterprises such as Kocel Steel Foundry, FAG Railway Bearing (Ningxia), Ningxia Little Giant Machine Tools, etc. Major industries include machinery and equipment manufacturing, new materials, fine chemicals and the animation industry.  Desheng Industrial Park (in Helan County) is a base for about 400 enterprises. The industrial park has industrial chains from Muslim food and commodities to trade and logistics, new materials and bio-pharmaceuticals that has 80 billion yuan in fixed assets. Desheng is looking to be the most promising industrial park in the city. It achieved a total output value of 4.85 billion in 2008, up 40 percent year-on-year. The local government plans to cut taxes and other fees to reduce the burden on local enterprises. The industrial output value reached 2.68 billion yuan in 2008, an increase of 48 percent from a year earlier.

Demographics.

Religion.

The major religions in Ningxia are Islam among the Hui Chinese, while many of the Han Chinese practice Chinese folk religions, Taoism, Confucianism and Chinese Buddhism. According to a demographic analysis of the year 2010, Muslims form 34% of the province's population. Christianity is the religion of 1.17% of the province's population according to the Chinese General Social Survey of 2004.

Tourism.

One of Ningxia's main tourist spots is the internationally renowned Xixia Tombs site located west of Yinchuan. The remnants of nine Western Xia emperors' tombs and two hundred other tombs lie within a area. Other famous sites in Ningxia include the Helan Mountains, the mysterious 108 stupas, the twin pagodas of Baisikou and the desert research outpost at Shapatou. A less visited tourist spot in Ningxia is the Mount Sumeru Grottoes (), which is among the ten most famous grottoes in China.

Ningxia (, ; alternately romanized as Ninghsia), officially the Ningxia Hui Autonomous Region (NHAR), is a landlocked autonomous region in the northwest of the People's Republic of China. Formerly a province, Ningxia was incorporated into Gansu in 1954 but was separated from Gansu in 1958 and was reconstituted as an autonomous region for the Hui people, one of the 56 officially recognised nationalities of China. Twenty percent of China's Hui population lives in Ningxia.

La région autonome hui du Ningxia (宁夏回族自治区, Níngxià Huízú Zìzhìqū) est la plus petite des régions autonomes chinoises. C'est aussi la deuxième moins peuplée après la Région autonome du Tibet et avant la Mongolie-Intérieure. Les Huis, chinois musulmans pour lesquels a été créée la province en 1928, sous la première République de Chine, ne représentent aujourd'hui qu'une minorité de la population. La région autonome apparut quant à elle en 1958 sous la République populaire de Chine.


Description.

Built on top of the Montparnasse – Bienvenüe Paris Métro station, the building has 59 floors.  The 56th floor, 200 metres from the ground, houses a restaurant called le Ciel de Paris, and the terrace on the top floor, are open to the public for viewing the city.  The view covers a radius of ; aircraft can be seen taking off from Orly Airport.  The guard rail, to which various antennae are attached, can be pneumatically lowered.

Occupation.

The tower is mainly occupied by offices. Various companies and organizations have settled in the tower:  The 56th floor, with its terrace, bars and restaurant, has been used for private or public events. During the 80s and 90s, the live National Lottery was cast on TF1 from the 56th floor.

Climbing the tower.

French urban climber Alain "Spiderman" Robert, using only his bare hands and feet and with no safety devices of any kind, scaled the building's exterior glass and steel wall to the top twice, in 1995 and in 2015.

Criticism.

The tower's simple architecture, large proportions and monolithic appearance have been often criticised for being out of place in Paris's urban landscape. As a result, two years after its completion the construction of buildings over seven storeys high in the city centre was banned.  The design of the tower predates architectural trends of more modern skyscrapers today that are often designed to provide a window for every office. Only the offices around the perimeter of each floor of Tour Montparnasse have windows.  It is said that the tower's observation deck enjoys the most beautiful view in all of Paris because it is the only place from which the tower cannot be seen.  A 2008 poll of editors on Virtualtourist voted the building the second-ugliest building in the world, behind Boston City Hall in the United States.

Asbestos contamination.

In 2005, studies showed that the tower contained asbestos material. When inhaled, for instance during repairs, asbestos is a carcinogen. Monitoring revealed that legal limits of fibers per liter were surpassed and, on at least one occasion, reached 20 times the legal limit. Due to health and legal concerns, some tenants abandoned their offices in the building.  The problem of removing the asbestos material from a large building used by thousands of people is unique. The projected completion time for removal was cited as three years. After a nearly three year delay, removal began in 2009 alongside regular operation of the building. In 2012, it was reported the Maine-Montparnasse Tower was 90% free of asbestos.

Tour Maine-Montparnasse (Maine-Montparnasse Tower), also commonly named Tour Montparnasse, is a office skyscraper located in the Montparnasse area of Paris, France. Constructed from 1969 to 1973, it was the tallest skyscraper in France until 2011, when it was surpassed by the Tour First. It remains the tallest building in Paris outside of the La Défense business district., it is the 19th tallest building in the European Union. The tower was designed by architects Eugène Beaudouin, Urbain Cassan, and Louis Hoym de Marien and built by Campenon Bernard. On September 21, 2017, Nouvelle AOM won a competition to redesign the building's facade.

La tour Montparnasse est le plus haut gratte-ciel de Paris intra-muros, situé dans le quartier Necker () de Paris. Sa hauteur de (ou selon les sources) en a fait pendant près de quarante ans l'immeuble le plus haut de France, jusqu'à l'achèvement, à Courbevoie - La Défense en 2011, de la tour First.


Names.

The earliest attested term referring to Lacedaemon is the Mycenaean Greek, "ra-ke-da-mi-ni-jo", "Lacedaimonian", written in Linear B syllabic script, the equivalent of the later Greek, "Lakedaimonios" (Latin: "Lacedaemonius").  The ancient Greeks used one of three words to refer to the Spartan city-state and its location. First, "Sparta" refers primarily to the main cluster of settlements in the valley of the Eurotas River. The second word, "Lacedaemon" (), was often used as an adjective and is the name referenced in the works of Homer and the historians Herodotus and Thucydides. The third term, "Laconice" (), referred to the immediate area around the town of Sparta, the plateau east of the Taygetos mountains, and sometimes to all the regions under direct Spartan control, including Messenia.  Herodotus seems to use "Lacedaemon" for the Mycenaean Greek citadel at Therapne, in contrast to the lower town of Sparta. This term could be used synonymously with Sparta, but typically it denoted the terrain in which the city was located. In Homer it is typically combined with epithets of

Geography.

Sparta is located in the region of Laconia, in the south-eastern Peloponnese. Ancient Sparta was built on the banks of the Eurotas River, the largest river of Laconia, which provided it with a source of fresh water. The valley of the Eurotas

Mythology.

Lacedaemon (Greek: ) was a mythical king of Laconia. The son of Zeus by the nymph Taygete, he married Sparta, the daughter of Eurotas, by whom he became the father of Amyclas, Eurydice, and Asine. As

Archaeology of the classical period.

Thucydides wrote:Suppose the city of Sparta to be deserted, and nothing left but the temples and the ground-plan, distant ages would be very unwilling to believe that the power of the Lacedaemonians was at all equal to their fame. Their city is not built continuously, and has no splendid temples or other edifices; it rather resembles a group of villages, like the ancient towns of Hellas, and would therefore make a poor show.  Until the early 20th century, the chief ancient buildings at Sparta were the theatre, of which, however, little showed above ground except portions of the retaining walls; the so-called "Tomb of Leonidas", a quadrangular building, perhaps a temple, constructed of immense blocks of stone and containing two chambers; the foundation of an ancient bridge over the Eurotas; the ruins of a circular structure; some remains of late Roman fortifications; several brick buildings and mosaic pavements.  The remaining archaeological wealth consisted of inscriptions, sculptures, and other objects collected in the local museum, founded by Stamatakis in 1872 and enlarged in 1907. Partial excavation of the round building was undertaken in 1892 and 1893 by the American School at Athens. The structure has been since found to be a semicircular retaining wall of Hellenic origin that was partly restored during the Roman period.  In 1904, the British School at Athens began a thorough exploration of Laconia, and in the following year excavations were made at Thalamae, Geronthrae, and Angelona near Monemvasia. In 1906, excavations began in Sparta itself.  A "small circus" (as described by Leake) proved to be a theatre-like building constructed soon after CE 200 around the altar and in front of the temple of Artemis Orthia. It is believed that musical and gymnastic contests took place here, as well as the famous flogging ordeal administered to Spartan boys ("diamastigosis"). The temple, which can be dated to the 2nd century BCE, rests on the foundation of an older temple of the 6th century, and close beside it were found the remains of a yet earlier temple, dating from the 9th or even the 10th century. The votive offerings in clay, amber, bronze, ivory and lead dating from the 9th to the 4th centuries BCE, which were found in great profusion within the precinct range, supply invaluable information about early Spartan art.  In 1907, the location of the sanctuary of Athena "of the Brazen House" (Χαλκίοικος, Chalkioikos) was determined to be on the acropolis immediately above the theatre. Though the actual temple is almost completely destroyed, the site has produced the longest extant archaic inscription in Laconia, numerous bronze nails and plates, and a considerable number of votive offerings. The city-wall, built in successive stages from the 4th to the 2nd century, was traced for a great part of its circuit, which measured 48 stades or nearly (Polyb. 1X. 21). The late Roman wall enclosing the acropolis, part of which probably dates from the years following the Gothic raid of CE 262, was also investigated. Besides the actual buildings discovered, a number of points were situated and mapped in a general study of Spartan topography, based upon the description of Pausanias.

History.

Prehistory, "dark age" and archaic period.

The prehistory of Sparta is difficult to reconstruct because the literary evidence was written far later than the events it describes and is distorted by oral tradition. The earliest certain evidence of human settlement in the region of Sparta consists of pottery dating from the Middle Neolithic period, found in the vicinity of Kouphovouno some two kilometres () south-southwest of Sparta. These are the earliest traces of the original Mycenaean Spartan civilisation represented in Homer's "Iliad".  This civilization seems to have fallen into decline by the late Bronze Age, when, according to Herodotus, Macedonian tribes from the north (called Dorians by those they conquered) marched into the Peloponnese and, subjugating the local tribes, settled there. The Dorians seem to have set about expanding the frontiers of Spartan territory almost before they had established their own state. They fought against

Classical Sparta.

In the Second Messenian War, Sparta established itself as a local power in the Peloponnesus and the rest of Greece. During the following centuries, Sparta's reputation as a land-fighting force was unequalled. At its peak around 500 BCE, Sparta had some 20,000–35,000 citizens, plus numerous helots and perioikoi. The likely total of 40,000–50,000 made Sparta one of the larger Greek city-states; however, according to Thucydides, the population of Athens in 431 BCE was 360,000–610,000, making it much larger.  In 480 BCE a small force led by King

Hellenistic and Roman Sparta.

Sparta never fully recovered from its losses at Leuctra in 371 BCE and the subsequent helot revolts. Nonetheless, it was able to continue as a regional power for over two centuries. Neither Philip II nor his son Alexander the Great attempted to conquer Sparta itself.  Even during its decline, Sparta never forgot its claim to be the "defender of Hellenism" and its Laconic wit. An anecdote has it that when Philip II sent a message to Sparta saying "If I enter Laconia, I

Postclassical and modern Sparta.

In 396 CE, Sparta was sacked by Visigoths under Alaric I who sold inhabitants into slavery. According to Byzantine sources, some parts of the Laconian region remained pagan until well into the

Structure of Classical Spartan society.

Constitution.

Sparta was an oligarchy. The state was ruled by two hereditary kings of the Agiad and Eurypontid families, both supposedly descendants of Heracles and equal in authority, so that one could not act against the power and political enactments of his colleague.  The duties of the kings were primarily religious, judicial, and military. As chief priests of the state, they maintained communication with the Delphian sanctuary, whose pronouncements exercised great authority in Spartan politics. In the time of Herodotus c. 450 BCE, their judicial functions had been restricted to cases dealing with heiresses, adoptions and the public roads. Aristotle describes the kingship at Sparta as "a kind of unlimited and perpetual generalship" (Pol. iii. 1285a), while Isocrates refers to the

Citizenship.

The Spartan education process known as the "agoge" was essential for full citizenship. However, usually the only boys eligible for the "agoge" were Spartiates, those who could trace their ancestry to the original inhabitants of the city.  There were two exceptions. "Trophimoi" or "foster sons" were foreign students invited to study. The Athenian general Xenophon, for example, sent his two

Non citizens.

The other classes were the perioikoi, free inhabitants who were non-citizens, and the helots, state-owned serfs. Descendants of non-Spartan citizens were forbidden the "agoge".

Helots.

The Spartans were a minority of the Lakonian population. The largest class of inhabitants were the helots (in Classical Greek / "Heílôtes").  The helots were originally free Greeks from the areas of Messenia and Lakonia whom the Spartans had defeated in battle and subsequently enslaved. In contrast to populations conquered by other Greek cities (e.g. the Athenian treatment of Melos), the male population was not exterminated and the women and children turned into chattel slaves. Instead, the helots were given a subordinate position in society more comparable to serfs in medieval Europe than chattel slaves in the rest of Greece.  Helots did not have voting or

Perioikoi.

The Perioikoi came from similar origins as the helots but occupied a significantly different position in Spartan society. Although they did not enjoy full citizen-rights, they were free and not subjected to the same restrictions as the helots. The exact nature of their subjection to the Spartans is not clear, but they seem to have served partly as a kind of military reserve, partly as skilled craftsmen and partly as agents of foreign trade. Perioikoic hoplites served increasingly with the Spartan army, explicitly at the Battle of Plataea, and although they may also have fulfilled functions such as the manufacture and repair of armour and weapons, they were increasingly integrated into the combat units of the Spartan army as the Spartiate population declined.

Economy.

Full citizen Spartiates were barred by law from trade or manufacture, which consequently rested in the hands of the Perioikoi. This lucrative monopoly, in a fertile territory with a good harbors, ensured the loyalty of the perioikoi. Despite the prohibition on menial labor or trade, there is evidence of Spartan sculptors, and Spartans were certainly poets, magistrates, ambassadors, and governors as well as soldiers.  Allegedly, Spartans were prohibited from possessing gold and silver coins, and according to legend Spartan currency consisted of iron bars to discourage hoarding. It was not until the 260s or 250s BCE that Sparta began to mint its own coins. Though the conspicuous display of wealth appears to have been discouraged, this did not preclude the production of very fine decorated bronze, ivory and wooden works of art as well as exquisite jewellery, attested in

Life in Classical Sparta.

Birth and death.

Sparta was above all a militarist state, and emphasis on military fitness began virtually at birth. Shortly after birth, a mother would bathe her child in wine to see whether the child was strong. If the child survived it was brought before the Gerousia by the child's father. The Gerousia then decided whether it was to be reared or not. It is commonly stated that if they considered it "puny and deformed", the baby was thrown into a chasm on Mount

Education.

When male Spartans began military training at age seven, they would enter the "agoge" system. The "agoge" was designed to encourage discipline and physical toughness and to emphasize the importance of the Spartan state. Boys lived in communal messes and, according to Xenophon, whose sons attended the "agoge", the boys were fed "just the right amount for them never to become sluggish through being too full, while also giving them a taste of what it is not to have enough." In addition they were trained to survive in times of privation, even if it meant stealing. Besides physical and weapons training, boys studied reading, writing, music and dancing. Special punishments were imposed if boys failed to answer questions sufficiently 'laconically' (i.e. briefly and wittily).  There is some evidence that in late-Classical and Hellenistic

Military life.

At age 20, the Spartan citizen began his membership in one of the "syssitia" (dining messes or clubs), composed of about fifteen members each, of which every citizen was required to be a member. Here each group learned how to bond and rely on one another. The Spartans were not eligible for election for public office until the age of 30. Only native Spartans were considered full citizens and were obliged to undergo the training as prescribed by law, as well as participate in and contribute financially to one of the "syssitia".  Sparta is thought to be the first city to practice

Agriculture, food, and diet.

Sparta's agriculture consisted mainly of barley, wine, cheese, grain, and figs. These items were grown locally on each Spartan citizens kleros and were tended to by helots. Spartan citizens were required to donate a certain amount

Marriage.

Plutarch reports the peculiar customs associated with the Spartan wedding night:The custom was to capture women for marriage(...) The so-called 'bridesmaid' took charge of the captured girl. She first shaved her head to the scalp, then dressed her in a man's cloak and sandals, and laid her down alone on a mattress in the dark. The bridegroom – who was not drunk and thus not impotent, but was sober as always – first had dinner in

Role of women.

Political, social, and economic equality.

Spartan women, of the citizenry class, enjoyed a status, power, and respect that was unknown in the rest of the classical world. The higher status of females in Spartan society started at birth; unlike Athens, Spartan girls were fed the same food as their brothers. Nor were they confined to their father's house and prevented from exercising or getting fresh air as in Athens, but exercised and even competed in sports. Most important, rather than being married off at the age of 12 or 13, Spartan law forbade

Historic women.

Many women played a significant role in the history of Sparta. Queen Gorgo, heiress to the throne and the wife of Leonidas I, was an influential and well-documented figure. Herodotus records that as a small girl she advised her father Cleomenes to resist a bribe. She was later said to be responsible for decoding a

Laconophilia.

Laconophilia is love or admiration of Sparta and its culture or constitution. Sparta was subject of considerable admiration in its day, even in rival Athens. In ancient times "Many of the noblest and best of the Athenians always considered the Spartan state nearly as an ideal theory realised in practice." Many Greek philosophers, especially Platonists, would often describe Sparta as an ideal state, strong, brave, and free from the corruptions of commerce and money. The French classicist François Ollier in his 1933 book "Le mirage spartiate" (The Spartan Mirage) warned that a major scholarly problem is that all surviving accounts of Sparta were by non-Spartans who often excessively idealized their subject.  With the revival of classical learning in Renaissance Europe, Laconophilia re-appeared, for example in the writings of Machiavelli. The Elizabethan English constitutionalist John Aylmer compared the mixed government of Tudor England to the Spartan republic, stating that "Lacedemonia [was] the noblest and best city governed that ever was". He commended it as a model for England. The philosopher Jean-Jacques Rousseau contrasted Sparta favourably with Athens in his Discourse on the Arts and Sciences, arguing that its austere constitution was preferable to the more sophisticated Athenian life. Sparta was also used as a model of austere purity by Revolutionary and Napoleonic France.  A German racist strain of Laconophilia was initiated by Karl Otfried Müller, who linked Spartan ideals to the supposed racial superiority of the Dorians, the ethnic sub-group of the Greeks to which the Spartans belonged. In the 20th century, this developed into Fascist admiration of Spartan ideals. Adolf Hitler praised the Spartans, recommending in 1928 that Germany should imitate them by limiting "the number allowed to live". He added that "The Spartans were once capable of such a wise measure... The subjugation of 350,000 Helots by 6,000 Spartans was only possible because of the racial superiority of the Spartans." The Spartans had created "the first racialist state".  Certain early Zionists, and particularly the founders of Kibbutz movement in Israel, were influenced by Spartan ideals, particularly in education. Tabenkin, a founding father of the Kibbutz movement and the Palmach strikeforce, prescribed that education for warfare "should begin from the nursery", that children should from kindergarten be taken to "spend nights in the mountains and valleys".  In modern times, the adjective "spartan" means simple, frugal, avoiding luxury and comfort. The term "laconic phrase" describes the very terse and direct speech characteristic of the Spartans.  Sparta also features prominently in modern popular culture, most famously the Battle of Thermopylae (see Battle of Thermopylae in popular culture).

Sparta (Doric Greek: Σπάρτα, "Spártā"; Attic Greek: Σπάρτη, "Spártē") was a prominent city-state in ancient Greece. In antiquity, the city-state was known as Lacedaemon (, ), while the name Sparta referred to its main settlement on the banks of the Eurotas River in Laconia, in south-eastern Peloponnese. Around 650 BCE, it rose to become the dominant military land-power in ancient Greece.

Sparte (en grec ancien soit « semée », « parsemée » ou « éparse », grec moderne, en dorien ) ou Lacédémone () est une ancienne ville grecque du Péloponnèse, perpétuée aujourd'hui par la ville moderne du même nom de habitants. Située sur l'Eurotas, dans la plaine de Laconie, entre le Taygète et le Parnon, elle est l'une des cités-États les plus puissantes de la Grèce antique, avec Athènes et Thèbes.


History.

Ferry service.

Before the bridge was built, the only practical short route between San Francisco and what is now Marin County was by boat across a section of San Francisco Bay. A ferry service began as early as 1820, with a regularly scheduled service beginning in the 1840s for the purpose of transporting water to San Francisco.  The Sausalito Land and Ferry Company service, launched in 1867, eventually became the Golden Gate Ferry Company, a Southern Pacific Railroad subsidiary, the largest ferry operation in the world by the late 1920s. Once for railroad passengers and customers only, Southern Pacific's automobile ferries became very profitable and important to the regional economy. The ferry crossing between the Hyde Street Pier in San Francisco and Sausalito Ferry Terminal in Marin County took approximately 20 minutes and cost $1.00 per vehicle, a price later reduced to compete with the new bridge. The trip from the San Francisco Ferry Building took 27 minutes.  Many wanted to build a bridge to connect San Francisco to Marin County. San Francisco was the largest American city still served primarily by ferry boats. Because it did not have a permanent link with communities around the bay, the city's growth rate was below the national average. Many experts said that a bridge could not be built across the strait, which had strong, swirling tides and currents, with water deep at the center of the channel, and frequent strong winds. Experts said that ferocious winds and blinding fogs would prevent construction and operation.

Conception.

Although the idea of a bridge spanning the Golden Gate was not new, the proposal that eventually took hold was made in a 1916 "San Francisco Bulletin" article by former engineering student James Wilkins. San Francisco's City Engineer estimated the cost at $100 million (equivalent to $ billion today), and impractical for the time. He asked bridge engineers whether it could be built for less. One who responded, Joseph Strauss, was an ambitious engineer and poet who had, for his graduate thesis, designed a railroad bridge across the Bering Strait. At the time, Strauss had completed some 400 drawbridges—most of which were inland—and nothing on the scale of the new project. Strauss's initial drawings were for a massive cantilever on each side of the strait, connected by a central suspension segment, which Strauss promised could be built for $17 million (equivalent to $ million today).  Local authorities agreed to proceed only on the assurance that Strauss would alter the design and accept input from several consulting project experts. A suspension-bridge design was considered the most practical, because of recent advances in metallurgy.  Strauss spent more than a decade drumming up support in Northern California. The bridge faced opposition, including litigation, from many sources. The Department of War was concerned that the bridge would interfere with ship traffic. The US Navy feared that a ship collision or sabotage to the bridge could block the entrance to one of its main harbors. Unions demanded guarantees that local workers would be favored for construction jobs. Southern Pacific Railroad, one of the most powerful business interests in California, opposed the bridge as competition to its ferry fleet and filed a lawsuit against the project, leading to a mass boycott of the ferry service.  In May 1924, Colonel Herbert Deakyne held the second hearing on the Bridge on behalf of the Secretary of War in a request to use federal land for construction. Deakyne, on behalf of the Secretary of War, approved the transfer of land needed for the bridge structure and leading roads to the "Bridging the Golden Gate Association" and both San Francisco County and Marin County, pending further bridge plans by Strauss. Another ally was the fledgling automobile industry, which supported the development of roads and bridges to increase demand for automobiles.  The bridge's name was first used when the project was initially discussed in 1917 by M.M. O'Shaughnessy, city engineer of San Francisco, and Strauss. The name became official with the passage of the Golden Gate Bridge and Highway District Act by the state legislature in 1923, creating a special district to design, build and finance the bridge. San Francisco and most of the counties along the North Coast of California joined the Golden Gate Bridge District, with the exception being Humboldt County, whose residents opposed the bridge's construction and the traffic it would generate.

Design.

Strauss was chief engineer in charge of overall design and construction of the bridge project. However, because he had little understanding or experience with cable-suspension designs, responsibility for much of the engineering and architecture fell on other experts. Strauss's initial design proposal (two double cantilever spans linked by a central suspension segment) was unacceptable from a visual standpoint. The final graceful suspension design was conceived and championed by Leon Moisseiff, the engineer of the Manhattan Bridge in New York City.  Irving Morrow, a relatively unknown residential architect, designed the overall shape of the bridge towers, the lighting scheme, and Art Deco elements, such as the tower decorations, streetlights, railing, and walkways. The famous International Orange color was Morrow's personal selection, winning out over other possibilities, including the US Navy's suggestion that it be painted with black and yellow stripes to ensure visibility by passing ships.  Senior engineer Charles Alton Ellis, collaborating remotely with Moisseiff, was the principal engineer of the project. Moisseiff produced the basic structural design, introducing his "deflection theory" by which a thin, flexible roadway would flex in the wind, greatly reducing stress by transmitting forces via suspension cables to the bridge towers. Although the Golden Gate Bridge design has proved sound, a later Moisseiff design, the original Tacoma Narrows Bridge, collapsed in a strong windstorm soon after it was completed, because of an unexpected aeroelastic flutter. Ellis was also tasked with designing a "bridge within a bridge" in the southern abutment, to avoid the need to demolish Fort Point, a pre–Civil War masonry fortification viewed, even then, as worthy of historic preservation. He penned a graceful steel arch spanning the fort and carrying the roadway to the bridge's southern anchorage.  Ellis was a Greek scholar and mathematician who at one time was a University of Illinois professor of engineering despite having no engineering degree. He eventually earned a degree in civil engineering from the University of Illinois prior to designing the Golden Gate Bridge and spent the last twelve years of his career as a professor at Purdue University. He became an expert in structural design, writing the standard textbook of the time. Ellis did much of the technical and theoretical work that built the bridge, but he received none of the credit in his lifetime. In November 1931, Strauss fired Ellis and replaced him with a former subordinate, Clifford Paine, ostensibly for wasting too much money sending telegrams back and forth to Moisseiff. Ellis, obsessed with the project and unable to find work elsewhere during the Depression, continued working 70 hours per week on an unpaid basis, eventually turning in ten volumes of hand calculations.  With an eye toward self-promotion and posterity, Strauss downplayed the contributions of his collaborators who, despite receiving little recognition or compensation, are largely responsible for the final form of the bridge. He succeeded in having himself credited as the person most responsible for the design and vision of the bridge. Only much later were the contributions of the others on the design team properly appreciated. In May 2007, the Golden Gate Bridge District issued a formal report on 70 years of stewardship of the famous bridge and decided to give Ellis major credit for the design of the bridge.

Finance.

The Golden Gate Bridge and Highway District, authorized by an act of the California Legislature, was incorporated in 1928 as the official entity to design, construct, and finance the Golden Gate Bridge. However, after the Wall Street Crash of 1929, the District was unable to raise the construction funds, so it lobbied for a $30 million bond measure (equivalent to $ million today). The bonds were approved in November 1930, by votes in the counties affected by the bridge. The construction budget at the time of approval was $27 million ($ million today). However, the District was unable to sell the bonds until 1932, when Amadeo Giannini, the founder of San Francisco–based Bank of America, agreed on behalf of his bank to buy the entire issue in order to help the local economy.

Construction.

Construction began on January 5, 1933. The project cost more than $35 million ($ in dollars), and was completed ahead of schedule and $1.3 million under budget (equivalent to $ million today). The Golden Gate Bridge construction project was carried out by the McClintic-Marshall Construction Co., a subsidiary of Bethlehem Steel Corporation founded by Howard H. McClintic and Charles D. Marshall, both of Lehigh University.  Strauss remained head of the project, overseeing day-to-day construction and making some groundbreaking contributions. A graduate of the University of Cincinnati, he placed a brick from his alma mater's demolished McMicken Hall in the south anchorage before the concrete was poured. He innovated the use of movable safety netting beneath the construction site, which saved the lives of many otherwise-unprotected ironworkers. Of eleven men killed from falls during construction, ten were killed on February 17, 1937, when the bridge was near completion and the net failed under the stress of a scaffold that had fallen. The workers' platform that was attached to a rolling hanger on a track collapsed when the bolts that were connected to the track were too small and the amount of weight was too great to bear. The platform fell into the safety net, but was too heavy and the net gave way. Two out of the twelve workers survived the fall into the icy waters, including the 37-year-old foreman, Slim Lambert. Nineteen others who were saved by the net over the course of construction became members of the Half Way to Hell Club.  The project was finished and opened May 27, 1937. The Bridge Round House diner was then included in the southeastern end of the Golden Gate Bridge, adjacent to the tourist plaza which was renovated in 2012. The Bridge Round House, an Art Deco design by Alfred Finnila completed in 1938, has been popular throughout the years as a starting point for various commercial tours of the bridge and an unofficial gift shop. The diner was renovated in 2012 and the gift shop was then removed as a new, official gift shop has been included in the adjacent plaza.  During the bridge work, the Assistant Civil Engineer of California Alfred Finnila had overseen the entire iron work of the bridge as well as half of the bridge's road work. With the death of Jack Balestreri in April 2012, all workers involved in the original construction are now deceased.

Torsional bracing retrofit.

In 1953 and 1954, the bridge was retrofitted with lateral and diagonal bracing that connected the lower chords of the two side trusses. This bracing stiffened the bridge deck in torsion so that it would better resist the types of twisting that had destroyed the Tacoma Narrows Bridge in 1940.

Opening festivities, and 50th and 75th anniversaries.

The bridge-opening celebration began on May 27, 1937, and lasted for one week. The day before vehicle traffic was allowed, 200,000 people crossed either on foot or on roller skates. On opening day, Mayor Angelo Rossi and other officials rode the ferry to Marin, then crossed the bridge in a motorcade past three ceremonial "barriers," the last a blockade of beauty queens who required Joseph Strauss to present the bridge to the Highway District before allowing him to pass. An official song, "There's a Silver Moon on the Golden Gate," was chosen to commemorate the event. Strauss wrote a poem that is now on the Golden Gate Bridge entitled "The Mighty Task is Done." The next day, President Franklin D. Roosevelt pushed a button in Washington, D.C. signaling the official start of vehicle traffic over the Bridge at noon. As the celebration got out of hand there was a small riot in the uptown Polk Gulch area. Weeks of civil and cultural activities called "the Fiesta" followed. A statue of Strauss was moved in 1955 to a site near the bridge.  In May 1987, as part of the 50th anniversary celebration, the Golden Gate Bridge district again closed the bridge to automobile traffic and allowed pedestrians to cross the bridge. However, this celebration attracted 750,000 to 1,000,000 people, and ineffective crowd control meant the bridge became congested with roughly 300,000 people, causing the center span of the bridge to flatten out under the weight. Although the bridge is designed to flex in that way under heavy loads, and was estimated not to have exceeded 40% of the yielding stress of the suspension cables, bridge officials stated that uncontrolled pedestrian access was not being considered as part of the 75th anniversary on Sunday, May 27, 2012, because of the additional law enforcement costs required "since 9/11."

Structural specifications.

Until 1964, the Golden Gate Bridge had the longest suspension bridge main span in the world, at. Since 1964 its main span length has been surpassed by fifteen bridges; it now has the second-longest main span in the United States, after the Verrazzano-Narrows Bridge in New York City. The total length of the Golden Gate Bridge from abutment to abutment is.  The Golden Gate Bridge's clearance above high water averages while its towers, at above the water, were the world's tallest on a suspension bridge until 1993 when it was surpassed by the Mezcala Bridge, in Mexico.  The weight of the roadway is hung from 250 pairs of vertical suspender ropes, which are attached to two main cables. The main cables pass over the two main towers and are fixed in concrete at each end. Each cable is made of 27,572 strands of wire. The total length of galvanized steel wire used to fabricate both main cables is estimated to be. Each of the bridge's two towers has approximately 600,000 rivets.  In the 1960s, when the Bay Area Rapid Transit system (BART) was being planned, the engineering community had conflicting opinions about the feasibility of running train tracks north to Marin County over the bridge. In June 1961, consultants hired by BART completed a study that determined the bridge's suspension section was capable of supporting service on a new lower deck. In July 1961, one of the bridge's consulting engineers, Clifford Paine, disagreed with their conclusion. In January 1962, due to more conflicting reports on feasibility, the bridge's board of directors appointed an engineering review board to analyze all the reports. The review board's report, released in April 1962, concluded that running BART on the bridge was not advisable.

Aesthetics.

Aesthetics was the foremost reason why the first design of Joseph Strauss was rejected. Upon re-submission of his bridge construction plan, he added details, such as lighting, to outline the bridge's cables and towers. In 1999, it was ranked fifth on the "List of America's Favorite Architecture" by the American Institute of Architects.  The color of the bridge is officially an orange vermilion called "international orange". The color was selected by consulting architect Irving Morrow because it complements the natural surroundings and enhances the bridge's visibility in fog.  The bridge was originally painted with red lead primer and a lead-based topcoat, which was touched up as required. In the mid-1960s, a program was started to improve corrosion protection by stripping the original paint and repainting the bridge with zinc silicate primer and vinyl topcoats. Since 1990, acrylic topcoats have been used instead for air-quality reasons. The program was completed in 1995 and it is now maintained by 38 painters who touch up the paintwork where it becomes seriously corroded. The ongoing maintenance task of painting the bridge is continuous.

Traffic.

Most maps and signage mark the bridge as part of the concurrency between U.S. Route 101 and California State Route 1. Although part of the National Highway System, the bridge is not officially part of California's Highway System. For example, under the, Route 101 ends at "the approach to the Golden Gate Bridge" and then resumes at "a point in Marin County opposite San Francisco". The Golden Gate Bridge, Highway and Transportation District has jurisdiction over the segment of highway that crosses the bridge instead of the California Department of Transportation (Caltrans).  The movable median barrier between the lanes is moved several times daily to conform to traffic patterns. On weekday mornings, traffic flows mostly southbound into the city, so four of the six lanes run southbound. Conversely, on weekday afternoons, four lanes run northbound. During off-peak periods and weekends, traffic is split with three lanes in each direction.  From 1968 to 2015, opposing traffic was separated by small, plastic pylons; during that time, there were 16 fatalities resulting from 128 head-on collisions. To improve safety, the speed limit on the Golden Gate Bridge was reduced from on October 1, 1983. Although there had been discussion concerning the installation of a movable barrier since the 1980s, only in March 2005 did the Bridge Board of Directors commit to finding funding to complete the $2 million study required prior to the installation of a movable median barrier. Installation of the resulting barrier was completed on January 11, 2015, following a closure of 45.5 hours to private vehicle traffic, the longest in the bridge's history. The new barrier system, including the zipper trucks, cost approximately $30.3 million to purchase and install.

Usage and tourism.

The bridge is popular with pedestrians and bicyclists, and was built with walkways on either side of the six vehicle traffic lanes. Initially, they were separated from the traffic lanes by only a metal curb, but railings between the walkways and the traffic lanes were added in 2003, primarily as a measure to prevent bicyclists from falling into the roadway.  The bridge carries about 112,000 vehicles per day according to the Golden Gate Bridge Highway and Transportation District. The main walkway is on the eastern side, and is open for use by both pedestrians and bicycles in the morning to mid-afternoon during weekdays (5:00 a.m. to 3:30 p.m.), and to pedestrians only for the remaining daylight hours (until 6:00 p.m., or 9:00 p.m. during DST). The eastern walkway is reserved for pedestrians on weekends (5:00 a.m. to 6:00 p.m., or 9:00 p.m. during DST), and is open exclusively to bicyclists in the evening and overnight, when it is closed to pedestrians. The western walkway is open only for bicyclists and only during the hours when they are not allowed on the eastern walkway.  Bus service across the bridge is provided by two public transportation agencies: San Francisco Muni and Golden Gate Transit. Muni offers Saturday and Sunday service on the Marin Headlands Express bus line, and Golden Gate Transit runs numerous bus lines throughout the week. The southern end of the bridge, near the toll plaza and parking lot, is also accessible daily from 5:30 a.m. to midnight by Muni line 28. The Marin Airporter, a private company, also offers service across the bridge between Marin County and San Francisco International Airport.  A visitor center and gift shop, originally called the "Bridge Pavilion" (since renamed the “Golden Gate Bridge Welcome Center”), is located on the San Francisco side of the bridge, adjacent to the southeast parking lot. It opened in 2012, in time for the bridge's 75th anniversary celebration. A cafe, outdoor exhibits, and restroom facilities are located nearby. On the Marin side of the bridge, only accessible from the northbound lanes, is the H. Dana Bower Rest Area and Vista Point, named after the first landscape architect for the California Division of Highways.  Lands and waters under and around the bridge are homes to varieties of wildlife such as bobcats and sea lions. Three species of cetaceans (whales) that had been absent in the area for many years have shown recent recoveries/(re)colonizations in the vicinity of the bridge; researchers studying them have encouraged stronger protections and recommended that the public watch them from the bridge or from land, or use a local whale watching operator.

Tolls.

When the Golden Gate Bridge opened in 1937, the toll was 50cents per car (equivalent to $ in ), collected in each direction. In 1950 it was reduced to 40cents each way ($ in ), then lowered to 25cents in 1955 ($ in ). In 1968, the bridge was converted to only collect tolls from southbound traffic, with the toll amount reset back to 50cents ($ in ).  The last of the construction bonds were retired in 1971, with $35 million (equivalent to $M in ) in principal and nearly $39 million ($M in ) in interest raised entirely from bridge tolls. Tolls continued to be collected and subsequently incrementally raised; by 1991, the toll was $3.00 (equivalent to $ in ).  The bridge began accepting tolls via the FasTrak electronic toll collection system in 2002, with $4 tolls for FasTrak users and $5 for those paying cash (equivalent to $ and $ respectively in ). In November 2006, the Golden Gate Bridge, Highway and Transportation District recommended a corporate sponsorship program for the bridge to address its operating deficit, projected at $80 million over five years. The District promised that the proposal, which it called a "partnership program", would not include changing the name of the bridge or placing advertising on the bridge itself. In October 2007, the Board unanimously voted to discontinue the proposal and seek additional revenue through other means, most likely a toll increase. The District later increased the toll amounts in 2008 to $5 for FasTrak users and $6 to those paying cash (equivalent to $ and $ respectively in ).  In an effort to save $19.2 million over the following 10 years, the Golden Gate District voted in January 2011 to eliminate all toll takers by 2012 and use only open road tolling. Subsequently, this was delayed and toll taker elimination occurred in March 2013. The cost savings have been revised to $19 million over an eight-year period. In addition to FasTrak, the Golden Gate District implemented the use of license plate tolling (branded as "Pay-by-Plate"), and also a one time payment system for drivers to pay before or after their trip on the bridge. Twenty-eight positions were eliminated as part of this plan.  On April 7, 2014, the toll for users of FasTrak was increased from $5 to $6 (equivalent to $ in ), while the toll for drivers using either the license plate tolling or the one time payment system was raised from $6 to $7 (equivalent to $ in ). Bicycle, pedestrian, and northbound motor vehicle traffic remain toll free. For vehicles with more than two axles, the toll rate was $7 per axle for those using license plate tolling or the one time payment system, and $6 per axle for FasTrak users. During peak traffic hours, carpool vehicles carrying two or more people and motorcycles paid a discounted toll of $4 (equivalent to $ in ); drivers must have had Fastrak to take advantage of this carpool rate. The Golden Gate Transportation District then planned to increase the tolls by 25cents in July 2015, and then by another 25cents each of the next three years.

Congestion pricing.

In March 2008, the Golden Gate Bridge District board approved a resolution to start congestion pricing at the Golden Gate Bridge, charging higher tolls during the peak hours, but rising and falling depending on traffic levels. This decision allowed the Bay Area to meet the federal requirement to receive $158 million in federal transportation funds from USDOT Urban Partnership grant. As a condition of the grant, the congestion toll was to be in place by September 2009.  The first results of the study, called the Mobility, Access and Pricing Study (MAPS), showed that a congestion pricing program is feasible. The different pricing scenarios considered were presented in public meetings in December 2008.  In August 2008, transportation officials ended the congestion pricing program in favor of varying rates for metered parking along the route to the bridge including on Lombard Street and Van Ness Avenue.

Issues.

Suicides.

The Golden Gate Bridge is the second-most used suicide site/suicide bridge in the world, after the Nanjing Yangtze River Bridge. The deck is about above the water. After a fall of four seconds, jumpers hit the water at around. Most of the jumpers die from impact trauma. About 5% of the jumpers survive the initial impact but generally drown or die of hypothermia in the cold water.  After years of debate and over an estimated 1,500 deaths, suicide barriers began to be installed in April 2017. Construction was first estimated to take approximately four years at a cost of over $200 million. In December 2019, it was reported that construction of the suicide prevention net is two years behind schedule because of issues with the lead contractor, Shimmick Construction Co. Shimmick was sold in 2017, leading to the slowdown of several existing projects. As of December 2019, the completion date for the Golden Gate Bridge net was set for 2023.

Wind.

From its completion until 2008, the Golden Gate Bridge was closed because of weather conditions only three times: on December 1, 1951, because of gusts of ; on December 23, 1982, because of winds of ; and on December 3, 1983, because of wind gusts of.  An anemometer, placed midway between the two towers on the west side of the bridge, has been used to measure wind speeds. Another anemometer was placed on one of the towers.  In June 2020, newly installed sidewalk railing slats created unintended and audible harmonic resonances from strong westerly winds. Under these conditions, this noise can be heard miles from the bridge itself.

Seismic vulnerability and improvements.

Modern knowledge of the effect of earthquakes on structures led to a program to retrofit the Golden Gate to better resist seismic events. The proximity of the bridge to the San Andreas Fault places it at risk for a significant earthquake. Once thought to have been able to withstand any magnitude of foreseeable earthquake, the bridge was actually vulnerable to complete structural failure (i.e., collapse) triggered by the failure of supports on the arch over Fort Point. A $392 million program was initiated to improve the structure's ability to withstand such an event with only minimal (repairable) damage. One challenging undertaking is completing this program without disrupting traffic. A complex electro-hydraulic synchronous lift system was custom built for construction of temporary support towers and a series of intricate lifts, transferring the loads from the existing bridge onto the temporary supports. This was completed with engineers from Balfour Beatty and Enerpac, accomplishing this task without disrupting day-to-day San Francisco commuter traffic. Although the retrofit was initially planned to be completed in 2012, as of 2017, it was expected to take several more years to complete all of the necessary work.  The former elevated approach to the Golden Gate Bridge through the San Francisco Presidio, known as Doyle Drive, dated to 1933 and was named after Frank P. Doyle. Doyle, the president of the Exchange Bank in Santa Rosa and son of the bank's founder, was the man who, more than any other person, made it possible to build the Golden Gate Bridge. The highway carried about 91,000 vehicles each weekday between downtown San Francisco and the North Bay and points north. The road was deemed "vulnerable to earthquake damage," had a problematic 4-lane design, and lacked shoulders; a San Francisco County Transportation Authority study recommended that it be replaced. Construction on the $1 billion replacement, temporarily known as the Presidio Parkway, began in December 2009. The elevated Doyle Drive was demolished on the weekend of April 27–30, 2012, and traffic used a part of the partially completed Presidio Parkway, until it was switched onto the finished Presidio Parkway on the weekend of July 9–12, 2015., an official at Caltrans said there is no plan to permanently rename the portion known as Doyle Drive.

The Golden Gate Bridge is a suspension bridge spanning the Golden Gate, the strait connecting San Francisco Bay and the Pacific Ocean. The structure links the U.S. city of San Francisco, California—the northern tip of the San Francisco Peninsula—to Marin County, carrying both U.S. Route 101 and California State Route 1 across the strait. The bridge is one of the most internationally recognized symbols of San Francisco and California. It was initially designed by engineer Joseph Strauss in 1917. It has been declared one of the Wonders of the Modern World by the American Society of Civil Engineers.

Le pont du Golden Gate (en anglais "", littéralement le « pont de la porte d'or ») est un pont suspendu américain situé dans l'État de Californie, traversant le Golden Gate, détroit par lequel la baie de San Francisco débouche dans l’océan Pacifique. Il permet ainsi de relier la ville de San Francisco, située à la pointe nord de la péninsule de San Francisco, à la ville de Sausalito, située à la pointe sud de la péninsule du comté de Marin. Financée par la Work Projects Administration, sa construction, qui se heurte à de nombreuses difficultés, débute en 1933 et s’étale sur une durée de quatre ans, pour s’achever en 1937.


Development.

The initial design and planning of Windows 95 can be traced back to around March 1992, just around the time before the release of Windows 3.1. At this time, "Windows for Workgroups 3.11" and Windows NT 3.1 were still in development and Microsoft's plan for the future was focused on Cairo. Cairo would be Microsoft's next-generation operating system based on Windows NT, featuring a new user interface and an object-based file system, but it was not planned to be shipped before 1994. However, Cairo would partially ship in late July 1996 in the form of Windows NT 4.0, but without the object-based file system, which would later evolve into WinFS.  Simultaneously with Windows 3.1's release, IBM started shipping OS/2 2.0. Microsoft realized they were in need of an updated version of Windows that could support 32-bit applications and preemptive multitasking, but could still run on low-end hardware (Windows NT did not). So the development of Windows "Chicago" was started and, as it was planned for a late 1993 release, became known as Windows 93 which was also known as Windows 4.0. Initially, the decision was made not to include a new user interface, as this was planned for Cairo, and only focus on making installation, configuration, and networking easier. Windows 93 would ship together with MS-DOS 7.0, offering a more integrated experience to the user and making it pointless for other companies to create DOS clones. MS-DOS 7.0 was in development at that time under the code name "Jaguar" and could optionally run on top of a Windows 3.1-based 32-bit protected-mode kernel called "Cougar" in order to better compete with DR-DOS. The first version of Chicago's feature specification was finished on September 30, 1992. Cougar was to become Chicago's kernel.

Beta.

Prior to Windows 95's official release, users in the United States and United Kingdom had an opportunity to participate in the Windows 95 Preview Program. For US$19.95/£19.95, users would receive several 3.5-inch floppy disks that would be used to install Windows 95 either as an upgrade from Windows 3.1x or as a fresh installation. Participants were also given a free preview of The Microsoft Network (MSN), the online service that Microsoft launched with Windows 95. During the preview period, Microsoft established various electronic distribution points for promotional and technical documentation on Chicago, including a detailed document for media reviewers describing the new system highlights. The preview versions expired in November 1995, after which the user would have to purchase their own copy of the final version of Windows 95.

Architecture.

Windows 95 was designed to be maximally compatible with existing MS-DOS and 16-bit Windows programs and device drivers while offering a more stable and better performing system. The Windows 95 architecture is an evolution of Windows for Workgroups' 386 enhanced mode. The lowest level of the operating system consists of a large number of "virtual device drivers" (VxDs) running in 32-bit protected mode and one or more virtual DOS machines running in virtual 8086 mode. The virtual device drivers are responsible for handling physical devices (such as video and network cards), emulating virtual devices used by the virtual machines or providing various system services. The three most important virtual device drivers are:  Access requests to physical media are sent to "Input/Output Supervisor", a component responsible for scheduling the requests. Each physical media has its own device driver: access to the disk is performed by a "port driver", while access to a SCSI device is handled by a "miniport" driver working atop the SCSI layer. Port and miniport drivers perform I/O operations in 32-bit protected mode, bypassing MS-DOS and BIOS, giving a significant performance improvement. In case there is no native Windows driver for a certain storage device, or if a device is forced to run in compatibility mode, the "Real Mode Mapper" can access it through MS-DOS.  32-bit Windows programs are assigned their own memory segments, which can be adjusted to any desired size. Memory area outside the segment cannot be accessed by a program. If a program crashes, nothing else is harmed. Before this, programs used fixed non-exclusive 64 KB segments. While the 64 KB size was a serious handicap in DOS and Windows 3.x, lack of guarantee of exclusiveness was the cause of stability issues because programs sometimes overwrote each other's segments. A crashing Windows 3.x program could knock out surrounding processes.  The Win32 API is implemented by three modules, each consisting of a 16-bit and a 32-bit component:

Dependence on MS-DOS.

To end-users, MS-DOS appears as an underlying component of Windows 95. For example, it is possible to prevent the loading of the graphical user interface and boot the system into a real-mode MS-DOS environment. This was done by inserting command.com in the autoexec.bat file or changing the BootGUI variable in the MSDOS.SYS file to 0. This sparked debate amongst users and professionals regarding the extent to which Windows 95 is an operating system or merely a graphical shell running on top of MS-DOS.  When the graphical user interface is started, the virtual machine manager takes over the filesystem-related and disk-related functionality. MS-DOS itself is demoted to a compatibility layer for 16-bit device drivers. This contrasts with earlier versions of Windows which rely on MS-DOS to perform file and disk access (Windows for Workgroups 3.11 could also largely bypass MS-DOS when 32-bit file access and 32-bit disk access were enabled). Keeping MS-DOS in memory allows Windows 95 to use DOS device drivers when suitable Windows drivers are unavailable. Windows 95 is capable of using all 16-bit Windows 3.x drivers.  Unlike Windows 3.1x, DOS programs running in Windows 95 do not need DOS drivers for the mouse, CD-ROM and sound card; Windows drivers are used instead. HIMEM.SYS is still required to boot Windows 95. EMM386 and other memory managers, however, are only used by legacy DOS programs. In addition, CONFIG.SYS and AUTOEXEC.BAT settings (aside from HIMEM.SYS) have no effect on Windows programs. DOS games, which could not be executed on Windows 3.x, can run inside Windows 95 (games tended to lock up Windows 3.x or cause other problems). As with Windows 3.x, DOS programs that use EGA or VGA graphics modes run in windowed mode (CGA and text mode programs can continue to run).  On startup, the MS-DOS component in Windows 95 responds to a pressed key by temporarily pausing the default boot process and presenting the DOS boot options menu, allowing the user to continue starting Windows normally, start Windows in safe mode or exit to the DOS prompt. As in previous versions of MS-DOS, there is no 32-bit support and DOS drivers must be loaded for mice and other hardware.  As a consequence of being DOS-based, Windows 95 has to keep internal DOS data structures synchronized with those of Windows 95. When starting a program, even a native 32-bit Windows program, MS-DOS momentarily executes to create a data structure known as the Program Segment Prefix. It is even possible for MS-DOS to run out of conventional memory while doing so, preventing the program from launching. Windows 3.x allocated "fixed" segments in conventional memory first. Since the segments were allocated as fixed, Windows could not move them, which would prevent any more programs from launching.  Microsoft partially removed support for File Control Blocks (an API hold-over of DOS 1.x and CP/M) in Windows 95 OSR2 (OEM Service Release 2). FCB functions can read FAT32 volumes, but not write to them.

User interface.

Windows 95 introduced a redesigned shell based around a desktop metaphor; the desktop was re-purposed to hold shortcuts to applications, files and folders, reminiscent of Mac OS.  In Windows 3.1 the desktop was used to display icons of running applications. In Windows 95, the currently running applications were displayed as buttons on a taskbar across the bottom of the screen. The taskbar also contained a notification area used to display icons for background applications, a volume control and the current time.  The Start menu, invoked by clicking the "Start" button on the taskbar, was introduced as an additional means of launching applications or opening documents. While maintaining the program groups used by its predecessor Program Manager, it also displayed applications within cascading sub-menus.  The previous File Manager program was replaced by Windows Explorer.  The user interface looked dramatically different from prior versions of Windows, but its design language did not have a special name like "Metro" or "Aqua" or "Material Design". Internally it was called "the new shell" and later simply "the shell". The subproject within Microsoft to develop the new shell was internally known as "Stimpy".  In 1994, Microsoft designers Mark Malamud and Erik Gavriluk approached Brian Eno to compose music for the Windows 95 project. The result was the six-second start-up music-sound of the Windows 95 operating system, "The Microsoft Sound".  When released for Windows 95 and NT 4.0, Internet Explorer 4 came with an optional Windows Desktop Update, which modified the shell to provide new features integrated with Internet Explorer, such as Active Desktop (which allowed Internet content to be displayed directly on the desktop) and additional updates to Windows Explorer.  Some of the user interface elements introduced in Windows 95, such as the desktop, taskbar, Start menu and Windows Explorer file manager, remained fundamentally unchanged on future versions of Windows.

Technical improvements.

Windows 95 included support for 255-character mixed-case long filenames and preemptively multitasked protected-mode 32-bit applications. 16-bit processes were still co-operatively multitasked.

Long file names.

32-bit File Access is necessary for the "long file names" feature introduced with Windows 95 through the use of the VFAT file system extension. It is available to both Windows programs and MS-DOS programs started from Windows (they have to be adapted slightly, since accessing long file names requires using larger pathname buffers and hence different system calls). Competing DOS-compatible operating systems released before Windows 95 cannot see these names. Using older versions of DOS utilities to manipulate files means that the long names are not visible and are lost if files are moved or renamed, as well as by the copy (but not the original), if the file is copied. During a Windows 95 automatic upgrade of an older Windows 3.1 system, DOS and third-party disk utilities which can destroy long file names are identified and made unavailable. When Windows 95 is started in DOS mode, e.g. for running DOS programs, low-level access to disks is locked out. In case the need arises to depend on disk utilities that do not recognize long file names, such as the MS-DOS 6.x's defrag utility, a program called LFNBACK for backup and restoration of long file names is provided on the CD-ROM, specifically in its \ADMIN\APPTOOLS\LFNBACK directory.

32-bit.

Windows 95 followed Windows for Workgroups 3.11 with its lack of support for older, 16-bit x86 processors, thus requiring an Intel 80386 (or compatible). While the OS kernel is 32-bit, much code (especially for the user interface) remained 16-bit for performance reasons as well as development time constraints. This had a rather detrimental effect on system stability and led to frequent application crashes.  The introduction of 32-bit file access in Windows for Workgroups 3.11 meant that 16-bit real mode MS-DOS is not used for managing the files while Windows is running, and the earlier introduction of the 32-bit disk access means that the PC BIOS is often no longer used for managing hard disks. DOS can be used for running old-style drivers for compatibility, but Microsoft discourages using them, as this prevents proper multitasking and impairs system stability. Control Panel allows a user to see which MS-DOS components are used by the system; optimal performance is achieved when they are bypassed. The Windows kernel uses MS-DOS style real-mode drivers in "Safe Mode", which exists to allow a user to fix problems relating to loading native, protected-mode drivers.

System requirements.

Official system requirements were an Intel 80386DX CPU of any speed, 4 MB of system RAM and 50–55 MB of hard disk space depending on features selected. These minimal claims were made in order to maximize the available market of Windows 3.1 migrations. This configuration would rely heavily on virtual memory and was only optimal for productive use on single-tasking dedicated workstations. It was possible to run Windows 95 on a 386 SX, but this led to even less acceptable performance due to its 16-bit external data bus. To achieve optimal performance, Microsoft recommended an Intel 80486 or compatible CPU with at least 8 MB of RAM.  Windows 95 may fail to boot on computers with more than approximately 480 MB of memory. In such a case, reducing the file cache size or the size of video memory can help. The theoretical maximum according to Microsoft is 2 GB.  Most copies of Windows 95 were on CD-ROM, but a floppy version could also be had for older machines. The retail floppy disk version of Windows 95 came on 13 DMF formatted floppy disks, while OSR 2.1 doubled the floppy count to 26. Both versions exclude additional software that the CD-ROM version might have featured. Microsoft Plus! for Windows 95 was also available on floppy disks. DMF was a special 21-sector format that Microsoft used to store 1.68 MB on floppy disks rather than the usual 1.44 MB.

Upgradeability.

Windows 95 was superseded by Windows 98 and could still be directly upgraded by either Windows 2000 Professional or Windows Me. Office 2000 is the last version of Microsoft Office to be compatible with Windows 95. Similarly, Windows Media Player 7.1, released in May 2001, and DirectX 8.0a, released in February 2001, are the last versions of Windows Media Player and DirectX available for Windows 95, respectively.

Internet Explorer.

Windows 95 originally shipped without Internet Explorer, and the default network installation did not install TCP/IP, the network protocol used on the Internet. At the release date of Windows 95, Internet Explorer 1.0 was available, but only in the Plus! add-on pack for Windows 95, which was a separate product. The Plus! Pack did not reach as many retail consumers as the operating system itself (it was mainly advertised for its non-Internet-related add-ons such as themes and better disk compression) but was usually included in pre-installed (OEM) sales, and at the time of Windows 95's release, the web was being browsed mainly with a variety of early web browsers such as NCSA Mosaic and Netscape Navigator (promoted by products such as IBox).  Windows 95 OEM Service Release 1 was the first release of Windows to include Internet Explorer (version 2.0) with the OS. While there was no uninstaller, it could be deleted easily if desired. OEM Service Release 2 included Internet Explorer 3. The installation of Internet Explorer 4 on Windows 95 (or the OSR2.5 version preinstalled on a computer) gave Windows 95 Active Desktop and browser integration into Windows Explorer, known as the Windows Desktop Update. The CD version of the last release of Windows 95, OEM Service Release 2.5 (Version 4.00.950C), includes Internet Explorer 4, and installs it after Windows 95's initial setup and first boot are complete.  While only the 4.x series of the browser contained the option to install the Windows Desktop Update features, the subsequent 5.x version had the option hidden. Editing the installer's configuration file located in a temporary folder would make the feature available in the installer. Alternatively, the user could install IE4 with the desktop update before installing a newer version of Internet Explorer. The last version of Internet Explorer supported on Windows 95 is Internet Explorer 5.5, which was released in 2000. Windows 95 shipped with Microsoft's own dial-up online service called The Microsoft Network (MSN).

Release and promotion.

The Windows 95 release included a commercial featuring The Rolling Stones' 1981 single "Start Me Up" (a reference to the Start button). It was widely reported that Microsoft paid the Rolling Stones between US$8 and US$14 million for the use of the song in the Windows 95 advertising campaign. However, Microsoft said that this was just a rumor spread by the band to increase their market value, and the company actually paid a fraction of that amount. A 30-minute promotional video, labeled a "cyber sitcom," featuring Jennifer Aniston and Matthew Perry, was also released to showcase the features of Windows 95. Microsoft's US$300 million advertising campaign featured stories of people waiting in line outside stores to get a copy.  In the UK, the largest computer chain PC World received a large quantity of point-of-sale material; many branches opened at midnight to sell the first copies of the product. Copies of "The Times" were available for free, and Microsoft paid for 1.5 million issues (twice the daily circulation at the time).  In the United States, the Empire State Building in New York City was lit to match the colors of the Windows logo. In Canada, a banner was hung down the side of the CN Tower in Toronto.  The release included a number of "Fun Stuff" items on the CD, including music videos of Edie Brickell's "Good Times" and Weezer's "Buddy Holly," a trailer for the 1995 film "Rob Roy" and the computer game "Hover!"  Sales were strong, with one million copies shipped worldwide in just four days. According to International Data Corporation, by the end of 1998, Windows 95 was the most used desktop OS with 57.4% of the marketshare, with its successor Windows 98 coming in second at 17.2%. Windows 95 also still sold more non-OEM copies to large customers in the month of May 1999, which analysts attributed to large companies opting to wait for the release of Windows 2000.

Editions.

A number of Windows 95 editions have been released. Only the original release was sold as a shrink-wrapped product; later editions were provided only to computer OEMs for installation on new PCs. For this reason, these editions are known as OEM Service Releases (OSR).  Together with the introduction of Windows 95, Microsoft released the "Microsoft Plus! for Windows 95" pack, which contained a number of optional components for high-end multimedia PCs, including Internet Explorer, DriveSpace and additional themes.  The first service pack was made available half a year after the original release and fixed a number of small bugs.  The second service pack mainly introduced support for new hardware, most notably support for hard drives larger than 2 GB in the form of the FAT32 file system. This release was never made available to end-users directly and was only sold through OEMs with the purchase of a new PC.  A full third service pack was never released, but two smaller updates to the second were released in the form of a USB Supplement (OSR 2.1) and the Windows Desktop Update (OSR 2.5). Both were available as stand-alone updates and as updated disc images shipped by OEMs. OSR 2.5 was notable for featuring a number of changes to the Windows Explorer, integrating it with Internet Explorer 4.0—this version of Internet Explorer looks very similar to the one featured in Windows 98.

Legacy.

On December 31, 2001, Microsoft ended its support for Windows 95, making it an "obsolete" product per the Microsoft Lifecycle Policy.  Many features that have since become key components of the Microsoft Windows series, such as the Start menu and the taskbar, originated in Windows 95. Neil MacDonald, a Gartner analyst, said that Windows 95 "was a quantum leap in difference in technological capability and stability." Ina Fried of "CNET" said that "by the time Windows 95 was finally ushered off the market in 2001, it had become a fixture on computer desktops around the world."  Even though support for Windows 95 has ended, the software has occasionally remained in use on legacy systems for various purposes. In addition, some video game enthusiasts choose to use Windows 95 for their legacy system to play old DOS games, although some other versions of Windows such as Windows 98 can also be used for this purpose.

Further reading.

Microsoft:  Third-party:

Windows 95 is a consumer-oriented operating system developed by Microsoft as part of its Windows 9x family of operating systems. The first operating system in the 9x family, it is the successor to Windows 3.1x, and was released to manufacturing on August 15, 1995, and generally to retail on August 24, 1995. Windows 95 merged Microsoft's formerly separate MS-DOS and Microsoft Windows products, and featured significant improvements over its predecessor, most notably in the graphical user interface (GUI) and in its simplified "plug-and-play" features. There were also major changes made to the core components of the operating system, such as moving from a mainly cooperatively multitasked 16-bit architecture to a 32-bit preemptive multitasking architecture, at least when running only 32-bit protected mode applications.

Windows 95 est un système d'exploitation à environnement graphique destiné aux particuliers. La première version est sortie le, vendue par Microsoft. C'est une progression significative par rapport aux précédentes versions de Windows. Pendant son développement, il avait été désigné sous le nom de Windows 4.0, ou par le nom de code de Chicago.