Prague Castle is a castle complex in Prague, Czech Republic, dating from the 9th century. It is the official office of the President of the Czech Republic. The castle was a seat of power for kings of Bohemia, Holy Roman emperors, and presidents of Czechoslovakia. The Bohemian Crown Jewels are kept within a hidden room inside it.
According to the Guinness Book of Records, Prague Castle is the largest ancient castle in the world. The castle is among the most visited tourist attractions in Prague attracting over 1.8 million visitors annually.
The castle buildings represent virtually every architectural style of the last millennium. Prague Castle includes Gothic St Vitus Cathedral, Romanesque Basilica of St. George, a monastery and several palaces, gardens and defense towers. Most of the castle areas are open to tourists. The castle houses several museums, including the National Gallery collection of Bohemian baroque and mannerism art, exhibition dedicated to Czech history, Toy Museum and the picture gallery of Prague Castle, based on the collection of Rudolph II. The Summer Shakespeare Festival regularly takes place in the courtyard of Burgrave Palace.