In my opinion, the astronomical clock is the most interesting item in this square. The astronomical clock was installed in 1410 making it the world's third oldest astronomical clock and is the oldest one that is still working. Mounted on the southern wall of Old Town City Hall. Be sure to come on the hour to see an hourly clockwork show.
You can get a bird's eye view of the square by visiting the Old Town Hall located in the square itself.
Be sure to come back next Monday for another Future POI.