Exeter Cathedral's Astronomical Clock is of the fifteenth-century. It displays the hour of the day, the day of the lunar month and the phase of the moon. The modern clock mechanism was installed in 1885 by Gillett & Bland of Croydon, and restored in 1910. If you look at the door beneath it you can see a round hole in the bottom right. That is where the Cathedral's cat would chase mice that scuttled around in the clock chamber. The Hickory, Dickery, Dock, nursery rhyme started from this clock.
