UNESCO protects the historical centre of Prague Prague is an essential urban monument reservation. The historic core, 866 hectares in size, encompasses the unique city ensemble of the Prague Castle and Hradčany, Malá Strana (Lesser Side) including Karlův most (Charles Bridge), Staré Město (Old Town) with Josefov (the preserved section of the former Jewish town), Nové Město (New Town), Vyšehrad and each of the monuments within these areas. It was included on the UNESCO List in 1992. Each part of the capital city of the Czech Lands – the Lesser Town, the Castle District, the Old and New Towns, was developed from the 10th century onwards. Prague Castle, the Cathedral of St. Vitus and Charles Bridge, many churches and palaces form a magnificent architectural, artistic and spiritual ensemble.

Prague Castle is a castle complex in Prague, Czech Republic, built in the 9th century.

Now it is the official office of the President of the Czech Republic. The castle used to be 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 globally, occupying an area of almost 70,000 square meters, at about 570 meters in length and an average of about 130 meters wide. The castle is among Prague's most visited tourist attractions, attracting over 1.8 million visitors annually.

A UNESCO World Heritage site consists of a large-scale composition of palaces and ecclesiastical buildings of various architectural styles, from Romanesque-style buildings from the 10th century to Gothic modifications of the 14th century.