This clock is very unique in that it is the only clock in the world to run on “Italian time”. The dials move from left to right and the 24 (placed on the bottom instead of the top), which in our culture signifies midnight actually means sunset. The time of sunset changes however and once a week the clock needs to be reset. Sunset it early modern cities was when the gates were locked and citizens were locked in (or out) until the next day. The cathedral bells were in sync with the clock and would toll to warn residents that the gates would soon be closed. The time for sunset has to always be at the 24 so depending on the week and how many hours of daylight there was going to be the clock would not be at the same place at the same time of day.