Every day at 13.13 and 21.13, among the clouds of smoke and to the accompaniment of music, Master Twardowski appears in one of the windows of tenement house No. 15 in the Old Market Square. In this building, there was an inn "Gospoda Pod Zgorzelcem".
According to the legend, the famous wizard Twardowski had been living there during his visit in Bydgoszcz in 1560.