The largest castle complex in the world and a UNESCO World Heritage site, Prague Castle has been home to Czech kings and Holy Roman emperors for over a thousand years. Built high atop a cliff called Hradčany, it remains the oldest medieval settlement in Prague. Now the seat of the Czech President, the castle houses a number of buildings, churches, and palaces — including the iconic Saint Vitus Cathedral, which dates back to 930 AD. The adjacent building is the Old Royal Palace, housing Vladislav Hall — the site of the defenestration of two catholic imperial emissaries which prompted Europe’s greatest religious conflict, The Thirty Years’ War. Other notable sights include the medieval pathway of goldsmith shops called Golden Lane, the Romanesque Basilica of St. George, and the Royal Garden commissioned by Habsburg Emperor Ferdinand I.