In 1386, Jogaila, the Grand Duke of Lithuania, converted to Christianity (specifically Catholicism) and subsequently became King of Poland through marriage to Queen Jadwiga of Poland. This initiated the Christianization of Lithuania. It also resulted in the Union of Krewo, signifying a personal union between the Grand Duchy of Lithuania and the Kingdom of Poland. The union commenced an enduring political alliance between the two entities and laid the foundations for the later establishment of the Polish-Lithuanian Commonwealth in 1569.
in 1386 jogaila the grand duke of lithuania converted to christianity (specifically catholicism) and subsequently became king of poland through marriage to queen jadwiga of poland this initiated the christianization of lithuania it also resulted in the union of krewo signifying a personal union between the grand duchy of lithuania and the kingdom of poland the union commenced an enduring political alliance between the two entities and laid the foundations for the later establishment of the polish-lithuanian commonwealth in 1569