George of Poděbrady, the Hussite ruler of Bohemia, promised to make Vladislaus his heir in 1468, because he needed Casimir IV's support against the rebellious Catholic noblemen and their ally, Matthias Corvinus, king of Hungary.
George of Poděbrady promised to make Vladislaus his heir in 1468, because he needed Casimir IV's support against the rebellious Catholic noblemen and their ally, Matthias Corvinus, king of Hungary. George of Poděbrady was the Hussite ruler of Bohemia.