In 1357, the charter of Wolbórz was modeled after more modern Magdeburg rights, and the town was so important, that it had a branch of the Cracow Academy, with a rector, six professors and permission to grant academic titles. On September 9, 1409, King Władysław II Jagiełło issued here an appeal to Polish clergy and nobility, urging them to fight the Teutonic Knights. Also, knights from Lesser Poland, Podolia and Red Ruthenia concentrated here before the Battle of Grunwald. King Jagiello visited Wolbórz as many as 15 times, other Polish rulers also came to the town, especially when Crown Tribunal was held in nearby Piotrków Trybunalski.