Prague Astronomical Clock, Prague.

The Prague Astronomical Clock, or Prague Orloj, is a medieval astronomical clock located in Prague, the capital of the Czech Republic. The first and perhaps most astonishing fact about this astronomical clock is that it was finished and in place in 1410, over eighty years before Columbus made his voyage of discovery to the Americas. The first thing that draws the eye is the dial at the center of the clock which shows the positions of the moon and the sun. What makes the Orloj a magnet for visitors to the Czech city is the clockwork show of the figures of the apostles, which on the hour parade themselves. (source)