One of the most well-known images of Prague—certainly if you judge by the number of shops selling cheap replicas of it—is the astronomical clock on the Old Town Hall building. The building was constructed in the 1300s and the clock was added in the early 1400s. The second dial is a much later addition, appearing in the 1900s. The clock was mostly destroyed in World Was II, so much of what you see now is a reconstruction.

Aside from telling time, it also tracked seasons, daylight, and months, basically the medieval conception of the world. When local noon chimes, two doors above the clock swing open and statues of 12 saints parade past yelling “cuckoo, cuckoo…”—no, wait, that’s Switzerland. These folks just parade. Hence the multiple images below.