Prague Castle is a castle complex in Prague 1 within Prague, 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.
Charles Bridge is a medieval stone arch bridge that crosses the Vltava river in Prague. Its construction started in 1357 under the auspices of King Charles IV, and finished in the early 15th century.
An astronomical clock – located at Old Town Square, is a clock with special mechanisms and dials to display astronomical information, such as the relative positions of the Sun, Moon, zodiacal constellations, and sometimes major planets.
Wenceslas Square is one of the main city squares and the centre of the business and cultural communities in the New Town of Praguec. Many historical events occurred there, and it is a traditional setting for demonstrations, celebrations, and other public gatherings. It is also the place with the busiest pedestrian traffic in the whole country. The square is named after Saint Wenceslas, the patron saint of Bohemia.