Jens was 60 when he started constructing the clock, but the story starts when he was only 25. In Strasbourg, the young locksmith saw an astronomical clock with a perpetual calendar in a cathedral.

If the workings of a mechanical timepiece give you a thrill, prepare to be blown away by this over-the-top astronomical clock. The horological masterpiece, which was designed by [Mark Frank] as ...

Located in the Old Town Square, the Prague Astronomical Clock has ... in a mirror to represent vanity and a skeleton to depict death. Each hour the clock shows a visualization of time unlike ...

In 1530, the astronomical clock workings were added ... incorporated into the clock at this time. Figures on the clock include a skeleton, a vain man carrying a mirror, philosopher, astronomer ...

Peter Scholey / Alamy Stock Photo The Astronomical Clock in Prague (1410) features a number of moving statues. These draw our attention more than static figures would. Every hour the skeleton ...