Astrarium of Giovanni Dondi dell'Orologio
Italy · built 1364
The Astrarium of Giovanni Dondi dall'Orologio was a complex astronomical clock built between 1348 and 1364 in Padua, the capital of an independent Signoria, by the doctor and clock-maker Giovanni Dondi dall'Orologio. The Astrarium had seven faces and 107 moving parts; it showed the positions of the Sun, the Moon and the five planets then known, as well as religious feast days. It was one of the first mechanical clocks to be built in Europe.
Monument data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).