the Mediterranean. However, the Ottoman threat to Europe was not ended until a Polish led coalition defeated the Ottoman at the Battle of Vienna in 1683. The Turks were driven out of Buda (the eastern part of Budapest they had occupied for a century), Belgrade, and Athens – though Athens was to be recaptured and held until 1829. The 16th century is often called Spain's Siglo de Oro (golden century). From its colonies in the Americas it gained large quantities of gold and silver, which helped make Spain the richest and most powerful country in the world. One of the greatest Spanish monarchs of the era was Charles I (1516–1556, who also held the title of Holy Roman Emperor Charles V). His attempt to unite these lands was thwarted by the divisions caused by the Reformation and ambitions of local rulers and rival rulers from other countries. Another great monarch was Philip II (1556–1598), whose reign was marked by several Reformation conflicts, like the loss of the Netherlands and the Spanish Armada. These events and an excess of spending would lead to a great decline in Spanish power and influence by the 17th century. After Spain began to decline in the 17th century, the Dutch, by virtue of its sailing ships, became the greatest world power, leading the 17th century to be called the Dutch Golden Age. The Dutch followed Portugal and Spain in establishing an overseas colonial empire — often under the corporate colonialism model of the East India and West India Companies. After the Anglo-Dutch Wars, France and England emerged as the two greatest powers in the 18th century. Louis XIV became king of France in 1643. His reign was one of the most opulent in European history. He built a large palace in the town of Versailles. The Holy Roman Emperor exerted no great influence on the lands of the Holy Roman Empire by the end of the Thirty Years' War. In the north of the empire, Prussia emerged as a powerful Protestant nation. Under many gifted rulers, like King Frederick the Great, Prussia expanded its power and defeated its rival Austria many times in war. Ruled by the Habsburg dynasty, Austria became a great empire, expanding at the expense of the Ottoman Empire and Hungary. One land where absolutism did not take hold was England, which had trouble with revolutionaries. Elizabeth I, daughter of Henry VIII,