Władysław Jagiełło

Władysław Jagiełło was the King of Poland from 1386 to 1434 and a pivotal figure in the history of Poland and Lithuania. He is best known for his role in the victory at the Battle of Grunwald in 1410 against the Teutonic Knights, which significantly shaped the power dynamics in Eastern Europe. His reign marked the beginning of the Jagiellonian dynasty, which brought prosperity and cultural flourishing to the region.