Casimir IV Jagiellon, Grand Duke of Lithuania from 1440 and King of Poland from 1447 (born 1427)

Casimir IV was Grand Duke of Lithuania from 1440 and King of Poland from 1447 until his death in 1492. He was one of the most active Polish-Lithuanian rulers; under him, Poland defeated the Teutonic Knights in the Thirteen Years' War and recovered Pomerania.