Prague Castle Picture Gallery. Prague Castle is a castle complex in Prague, Czech Republic, built in 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, occupying an area of almost 70,000 square metres, at about 570 metres in length and an average of about 130 metres wide. The castle is among the most visited tourist attractions in Prague attracting over 1.8 million visitors annually.
   The history of the castle began in 870 when its first walled building, the Church of the Virgin Mary, was built. The Basilica of Saint George and the Basilica of St. Vitus were founded under the reign of Vratislaus I, Duke of Bohemia and his son St. Wenceslas in the first half of the 10th century.
   The first convent in Bohemia was founded in the castle, next to the church of St. George. A Romanesque palace was erected here during the 12th century. King Ottokar II of Bohemia improved fortifications and rebuilt the royal palace for the purposes of representation and housing. In the 14th century, under the reign of Charles IV the royal palace was rebuilt in Gothic style and the castle fortifications were strengthened. In place of
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