The Astronomical Clock (Pražský orloj) is on one side of the Old Town Hall Tower (Staroměstská radnice). It dates from the 15th century.
To fully appreciate the clock's intricate construction, join the crowd in front of the tower to watch the procession of the Twelve Apostles: on the hour, every hour a trap door opens and Christ marches out ahead of his disciples, while the skeleton of death tolls the bell to a statue of a defiant Turk.
Below the Astronomical Clock are 12 medallions with the signs of the zodiac, added by Josef Manes in 1865.
The Old Town Hall Tower, built in 1338, is one of the most striking buildings in Prague. Inside is a staircase and an elevator. For a fee, visitors can climb or ride to the top to experience terrific views over the Old Town Square and the rest of the Old Town.
In 1364, the Old Town Hall Tower was knocked into a private house adjoining it, which in turn was connected to houses beside that. This amalgamation of buildings became known as the 'Old Town Hall'.
Extensive renovation in 1470 further integrated the various houses of the Old Town Hall, and the entire building was remodelled in the Gothic style.
A ticket to climb the tower also includes entry to the historical halls of the Old Town Hall, which have been recently renovated.
A Prague Tourist Information Centre is located in the reception area of the Old Town Hall, and civic ceremonies are held in its historical halls.
To discover more about the Old Town Hall, the Tower and the Astronomical Clock, take a Prague tour:
Prague Grand City Sightseeing Tour
Prague Grand City Sightseeing Tour & Boat
Prague All Inclusive Walking Tour & Boat.