Since Nowy Korczyn is located in the center of Lesser Poland, the town was frequently visited by Polish rulers. It was an important political and judicial center of the province, here Lesser Poland’s szlachta organized its meetings. In 1404, King Władysław Jagiełło called such a meeting, to discuss new taxes, needed for the planned purchase of the Dobrzyń Land from the Teutonic Knights. In 1438, also in Korczyn, the szlachta convened to discuss whether King Jagiełło should accept Bohemian crown. On April 25 of the same year, powerful Cardinal Zbigniew Oleśnicki, who opposed Polish alliance with Czech Hussites, called a Confederation here. In 1439, Polish supporters of the Hussites gathered near Nowy Korczyn, under Spytek of Melsztyn. On 4 May 1439 the royal army under Oleśnicki defeated the Hussites in the Battle of Grotniki.