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Jogaila, later Władysław II Jagiełło (b. about 1362 d. 1 June 1434), was a Grand Duke of Lithuania and King of Poland. He ruled in Lithuania from 1377, at first with his uncle, Kęstutis. In 1386, he converted to Christianity, was baptized as Władysław, married the young Queen Jadwiga of Poland, inducted into the Order of the Dragon and was crowned Polish king as Władysław Jagiełło. His reign in Poland lasted a further forty-eight years and laid the foundation for the centuries-long Polish–Lithuanian union. He gave his name to the Jagiellon branch of the established Lithuanian Gediminids dynasty, which ruled both states until 1572, and became one of the most influential dynasties in medieval Central and Eastern Europe.
Jogaila was the last pagan ruler of medieval Lithuania. He held the title Didysis Kunigaikštis. As King of Poland, he pursued a policy of close alliances with Lithuania against the Teutonic Order. The allied victory at the Battle of Grunwald in 1410, followed by the First Peace of Toruń, secured the Polish and Lithuanian borders and marked the emergence of the Polish–Lithuanian alliance as a significant force in Europe. The reign of Władysław II Jagiełło extended Polish frontiers and is often considered the beginning of Poland's "Golden Age". (Read more...)