Exeter Cathedral astronomical clock

[2] This indicates the hour of the day, counted from I to XII in Roman numerals in first the right and then the left hemispheres of the clockface.

The tail of the Sun's fleur-de-lis points to the day in the lunar month on the inner numbered ring.

The Latin inscription "Pereunt et imputantur" below the main dial may be translated as "The hours pass and are reckoned to our account".

Legend suggests that the round hole cut in the bottom of the door was for the cathedral cat to gain entry to keep the clock clear of mice and rats.

[7] The clock is reputed to be the source of the nursery rhyme Hickory Dickory Dock, probably inspired by the round hole in the door described above.

Exeter Cathedral Astronomical Clock.
Early mechanism for the astronomical clock which was removed in 1885, but restored by John James Hall in its current position on the floor of the north transept in 1910.