During the Polish–Lithuanian–Teutonic War, the Mstów monastery was a gathering point for royal troops. In the 15th century, Mstów had 105 houses, and remained an important location, where in 1474 Polish troops gathered under King Casimir IV, for a Silesian campaign against King of Hungary Matthias Corvinus. Mstów had its coat of arms and a seal, with an inscription "SI - Gillum - CIYITTATIS - MSTHUOW" (1564). At that time, and until 1795, Mstów belonged to Lelów County of Lesser Poland’s Kraków Voivodeship.