The Voivodeship and Municipal Public Library "Dr. Witold Bełza" in Bydgoszcz is housed in historical buildings located between the Stary Rynek and Długa street, registered on the Kuyavian-Pomeranian Voivodeship Heritage List. It is the oldest (1903) library in activity in the Kuyavian-Pomeranian Voivodeship. Since 2002, it bears the name of Witold Bełza.

Adam Franciszek Józef Siedlecki or Adam Grzymała-Siedlecki (AGS) (1876–1967) was a Polish literary and theater critic, playwright, translator, prose writer and director.