This week’s picture is of the Prague Orloj — it’s an astronomical clock in Prague’s Old Town Square:
The original clock was built in 1410, although it’s been repaired and rebuilt and added to over the centuries (particularly after severe damage sustained in World War II). In its current form, it has three main parts (top to bottom):
- “The Walk of the Apostles,” a clockwork show (every hour, on the hour) of various moving sculptures in the two windows under the arch (a 19th century addition)
- The astronomical dial, showing the position of the Sun and Moon in the sky along with other goodies.
- A calendar dial with medallions for the months.
The astronomical dial tends to receive a lot of attention — here’s a more-detailed shot: