 Przedecz is first mentioned in 1136 deed issued by Pope Innocent II, denoting the settlement as a possession held by the Polish Archbishops of Gniezno.With the historic Kujawy region, the fortified town was conquered by the Teutonic Knights during the First Polish–Teutonic War in 1329.Re-acquired by King Casimir III the Great upon the 1343 Treaty of Kalisz, municipal laws were introduced in 1365 and Przedecz obtained the status of a royal city of the Polish Crown.