Hampton Court Palace:
The dial is extremely complicated. It is fifteen feet in diameter and
consists of three separate copper dials, of different sizes, with a
common centre but revolving at different speeds. The hours, in two
sets of twelve, were originally painted on the stone but are now painted
on metal segments affixed to the stonework.
The clock tells the hour, month, day of the month, the position of the
sun in the ecliptic, the twelve signs of the zodiac, the number of days
that have elapsed since the beginning of the year, the phases of the
moon, its age in days, the hour in which it crosses the meridian, and,
therefore, the time of high water at London Bridge.
This clock was designed before the discoveries of Copernicus and
Galileo, when it was believed the sun revolved around the earth rather
than the earth around the sun. Consequently the clock depicts the
earth represented as a small globe in the centre, while the sun goes
around it on a pointer.
Source: Historic Royal Palaces Factsheet: The Astronomical Clock at Hampton Court Palace