
Astronomical Clock
The Prague Astronomical Clock is a medieval timepiece installed in 1410, anchored to the Old Town Hall on the southern wall facing Old Town Square. Its three-part mechanism is the heart of the clock: an astronomical dial showing the Sun and Moon’s positions and other celestial details; a calendar dial with medallions for the months; and the famous hourly performance, “The Walk of the Apostles,” with moving figures including a skeletal Death that tolls the hour. The clock’s original builders were Mikuláš of Kadaň, a horologist, and Jan Šindel, a university professor of mathematics and astronomy, with the earliest documented mention dated 9 October 1410. Around 1490, the calendar dial and Gothic sculptures were added, enriching the facade of the Old Town Hall. Today, the Orloj stands as a symbol of Prague’s long-rooted scientific knowledge and its cultural heritage. …
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