The clock tower in the northwest, with its barrel-vaulted passage, served as a gateway to the inner fortifications. The sliding channels of a portcullis have been preserved on the pillars of the western archway. The four-story building has a wooden battlement and parapets. The clock is located in a turret above the pyramid-shaped roof. The clockwork bears the inscription “Josef Roth – Uhrmacher – Kronstadt 1883”. There are dials on three sides of the clock tower.
Source: Wikipedia