Ladislaus III of Poland

Ladislaus (in Polish, Wladyslaw) III (October 31, 1424 - November 10, 1444), son of king Ladislaus II of Poland, was the second Jagiellonian king of Poland, reigning from 1434 until his death. He also reigned as king of Hungary from 1440 under the name Ulászló I. He died fighting the Ottoman Turkish army at Varna, now in eastern Bulgaria. He was succeeded in Poland by his younger brother Casimir.