In the main square of the medieval town, the clock served as a source of information for the general population, and shows the time in different measurement systems used then as the Roman and Germanic and the bohemian. The hours are just one of many functions, because the clock still shows the time of sunrise and sunset for each day of the year, the zodiac sign and the lunar cycle, and many other information, including a calendar.
Punctually every hour, a true spectacle happens when the clock strikes the bell and makes parading effigies of Christ's apostles on its facade.
The most amazing is that the mechanism that moves its hands and the dolls is still the original fifteenth century, with minor improvements made in the sixteenth century.
A real crowd is waiting in the square at each change of time, is very beautiful!