section_path: History/Middle Ages
section_name: Middle Ages
paragraph_text: Middle Ages
  
  After the fall of the Western Roman Empire, Italy fell under the Odoacer's kingdom, and was seized by the Ostrogoths. Invasions resulted in a chaotic succession of kingdoms and the supposed " Dark Ages ". The invasion of another Germanic tribe in the 6th century, the Lombards, reduced Byzantine presence and ended political unity of the peninsula. The north formed the Lombard kingdom, central-south was also controlled by the Lombards, and other parts remained Byzantine.
  
  The Lombard kingdom was absorbed into Francia by Charlemagne in the late 8th century and became the Kingdom of Italy. The Franks helped form the Papal States. Until the 13th century, politics was dominated by relations between the Holy Roman Emperors and the Papacy, with city-states siding with the former (Ghibellines) or with the latter (Guelphs) for momentary advantage. The Germanic emperor and Roman pontiff became the universal powers of medieval Europe. However, conflict over the Investiture Controversy and between Guelphs and Ghibellines ended the imperial-feudal system in the north, where cities gained independence. In 1176, the Lombard League of city-states, defeated Holy Roman Emperor Frederick Barbarossa, ensuring their independence.
  
  City-states—e.g. Milan, Florence, Venice —played a crucially innovative role in financial development by devising banking practices, and enabling new forms of social organization. In coastal and southern areas, maritime republics dominated the Mediterranean and monopolised trade to the Orient. They were independent thalassocratic city-states, in which merchants had considerable power. Although oligarchical, the relative political freedom they afforded was conducive to academic and artistic advancement. The best-known maritime republics were Venice, Genoa, Pisa, and Amalfi. Each had dominion over overseas lands, islands, lands on the Adriatic, Aegean, and Black seas, and commercial colonies in the Near East and North Africa.
  
  Venice and Genoa were Europe's gateways to the East, and producers of fine glass, while Florence was a centre of silk, wool, banking, and jewellery. The wealth generated meant large public and private artistic projects could be commissioned. The republics participated in the Crusades, providing support, transport, but mostly taking political and trading opportunities. Italy first felt the economic changes which led to the commercial revolution: Venice was able to sack Byzantine's capital and finance Marco Polo 's voyages to Asia; the first universities were formed in Italian cities, and scholars such as Aquinas obtained international fame; capitalism and banking families emerged in Florence, where Dante and Giotto were active around 1300. In the south, Sicily had become an Arab Islamic emirate in the 9th century, thriving until the Italo-Normans conquered it in the late 11th century, together with most of the Lombard and Byzantine principalities of southern Italy. The region was subsequently divided between the Kingdom of Sicily and Kingdom of Naples. The Black Death of 1348 killed perhaps a third of Italy's population.