This 18th-century police guardhouse was originally haphazardly constructed using wood, and later redone in classicist style by Jan Chrystian Kamsetzer in 1783-1787. In the inter-war period, it served as a garrison jailhouse. Like much of the Old Town, this structure was all but levelled in the Battle of Poznań in 1945, and the building had to be reconstructed in later years, serving as the Workers’ Movement Museum during communism. It currently houses the 1818-1819 Wielkopolska Uprising Museum.