Before World War I, the Bazar was the frequent site of patriotic meetings and protest rallies, many of which were violently disrupted by the Prussian police. The prominent pianist and politician Ignacy Paderewski arrived there on December 26, 1918 to deliver a fiery speech from a window in the Bazar Hotel. The speech sparked the Wielkopolska Uprising, which broke out the following day. The Bazar also housed the Uprising’s command headquarters. In January 1919, Polish insurgents took a solemn soldier’s oath in nearby Wolności Square (then Wilhelm Square).