King Casimir IV Jagiellon approves the old laws, changes some of them and confers new ones to the inhabitants of the entire Kingdom of Poland, near Radzyn, 11th December 1454 (ANK, Zbiór dokumentów pergaminowych, sygn. Perg. 250)
Guarding history. Krakow Town Archives of Former Records 1887–1952 - Treasures