Prague Astronomical Clock

The prague astronomical clock is mounted on the side of a tower which is part of the old town hall

Parts of the clock date from 1410. It consists of three main parts, 1, the astronomical dial
( shown at the top here ) which represents the sun and moon, 2, a calendar dial
representing the months ( bottom here ) and a set of figures representing the Apostles

The astonomical clock is quite complicated, see the image below for a description of the functions

A image of the various functionings of the astronomical clock mechanism

A close up of the calendar section with the representations of the months

A close up of the astronomical mechanism