During the political upheaval caused by Matthias Corvinus the duchy was overtaken in 1480 by Casimir II, Duke of Cieszyn from the Piast dynasty, who sold it in 1517 to the Hungarian magnates of the Thurzó family, forming the Pless state country.
During the political disturbances initiated by Matthias Corvinus, Casimir II, Duke of Cieszyn from the Piast dynasty, took control of the duchy and sold it to the Hungarian magnates of the Thurzó family in 1517. This action resulted in the formation of the Pless state country.