I do had some trouble reading the time on this clock, but I could appreciate the intend of the artist who made it. I wasn’t able to catch a marble, but the clock is a nice way to learn a bit more about the history of Brno and how the Swedes didn’t succeed in conquering this city.

Brno astronomical clock, namesti Svobody 5, Brno 602 00, Czech Republic
http://www.gotobrno.cz/en/brno-clock-sculpture

Visited February 2016. You can find my review about Brno astronomical clock also on TripAdvisor.