One of the main attractions of the Old Town Square is the Old Town Hall, on which the Astronomical Clock is installed.
The famous Astral chiming clock is on the south side of the tower, near them there is always a large number of tourists. There are several reasons. Vo-the first, on their own, they are very beautiful and unique. The Orloy's chimes show the zodiacal location of the Moon and the Sun and three hourly measurements: the Arab numerals show the Old Bohemian time, the Roman numerals indicate the Central European time, the planetary time is separately displayed.