section_path: History/Spanish Empire
section_name: Spanish Empire
paragraph_text: Spanish Empire
  
  In 1469, the crowns of the Christian kingdoms of Castile and Aragon were united by the marriage of their monarchs, Isabella I and Ferdinand II, respectively. In 1492, Jews were forced to choose between conversion to Catholicism or expulsion; as many as 200,000 Jews were expelled from Castile and Aragon. The year 1492 also marked the arrival of Christopher Columbus in the New World, during a voyage funded by Isabella. Columbus's first voyage crossed the Atlantic and reached the Caribbean Islands, beginning the European exploration and conquest of the Americas.
  
  The Treaty of Granada guaranteed religious tolerance towards Muslims, for a few years before Islam was outlawed in 1502 in Castile and 1527 in Aragon, leading the remaining Muslim population to become nominally Christian Moriscos. About four decades after the War of the Alpujarras (1568–1571), over 300,000 moriscos were expelled, settling primarily in North Africa.
  
  The unification of the crowns of Aragon and Castile by the marriage of their sovereigns laid the basis for modern Spain and the Spanish Empire, although each kingdom of Spain remained a separate country socially, politically, legally, and in currency and language.
  
  Habsburg Spain was one of the leading world powers throughout the 16th century and most of the 17th century, a position reinforced by trade and wealth from colonial possessions and became the world's leading maritime power. It reached its apogee during the reigns of the first two Spanish Habsburgs— Charles V/I (1516–1556) and Philip II (1556–1598). This period saw the Italian Wars, the Schmalkaldic War, the Dutch Revolt, the War of the Portuguese Succession, clashes with the Ottomans, intervention in the French Wars of Religion and the Anglo-Spanish War.
  
  Through exploration and conquest or royal marriage alliances and inheritance, the Spanish Empire expanded across vast areas in the Americas, the Indo-Pacific, Africa as well as the European continent (including holdings in the Italian Peninsula, the Low Countries and the Franche-Comté). The so-called Age of Discovery featured explorations by sea and by land, the opening-up of new trade routes across oceans, conquests and the beginnings of European colonialism. Precious metals, spices, luxuries, and previously unknown plants brought to the metropole played a leading part in transforming the European understanding of the globe. The cultural efflorescence witnessed during this period is now referred to as the Spanish Golden Age. The expansion of the empire caused immense upheaval in the Americas as the collapse of societies and empires and new diseases from Europe devastated American indigenous populations. The rise of humanism, the Counter-Reformation and new geographical discoveries and conquests raised issues that were addressed by the intellectual movement now known as the School of Salamanca, which developed the first modern theories of what are now known as international law and human rights.
  
  Spain's 16th-century maritime supremacy was demonstrated by the victory over the Ottoman Empire at the Battle of Lepanto in 1571 and over Portugal at the Battle of Ponta Delgada in 1582, and then after the setback of the Spanish Armada in 1588, in a series of victories against England in the Anglo-Spanish War of 1585–1604. However, during the middle decades of the 17th century Spain's maritime power went into a long decline with mounting defeats against the Dutch Republic (Battle of the Downs) and then England in the Anglo-Spanish War of 1654–1660; by the 1660s it was struggling to defend its overseas possessions from pirates and privateers.
  
  The Protestant Reformation increased Spain's involvement in religiously charged wars, forcing ever-expanding military efforts across Europe and in the Mediterranean. By the middle decades of a war- and plague -ridden 17th-century Europe, the Spanish Habsburgs had enmeshed the country in continent-wide religious-political conflicts. These conflicts drained it of resources and undermined the economy generally. Spain managed to hold on to most of the scattered Habsburg empire, and help the imperial forces of the Holy Roman Empire reverse a large part of the advances made by Protestant forces, but it was finally forced to recognise the separation of Portugal and the United Provinces (Dutch Republic), and eventually suffered some serious military reverses to France in the latter stages of the immensely destructive, Europe-wide Thirty Years' War. In the latter half of the 17th century, Spain went into a gradual decline, during which it surrendered several small territories to France and England; however, it maintained and enlarged its vast overseas empire, which remained intact until the beginning of the 19th century.