Prague (/prɑːɡ/ PRAHG; Czech: Praha [ˈpraɦa] (listen); German: Prag; Latin: Praga) is the capital and largest city in the Czech Republic, the 13th largest city in the European Union and the historical capital of Bohemia. Situated on the Vltava river, Prague is home to about 1.3 million people, while its metropolitan area is estimated to have a population of 2.7 million. The city has a temperate oceanic climate, with relatively warm summers and chilly winters. Prague is a political, cultural, and economic centre of central Europe complete with a rich history. Founded during the Romanesque and flourishing by the Gothic, Renaissance and Baroque eras, Prague was the capital of the Kingdom of Bohemia and the main residence of several Holy Roman Emperors, most notably of Charles IV (r. 1346–1378). It was an important city to the Habsburg Monarchy and its Austro-Hungarian Empire. The city played major roles in the Bohemian and the Protestant Reformations, the Thirty Years’ War and in 20th-century history as the capital of Czechoslovakia between the World Wars and the post-war Communist era.