Casimir III the Great , was the last King of Poland from the Piast dynasty, the son of King Władysław I ("the Elbow-high") and Duchess Hedwig of Kalisz.
Born in Kowal, Casimir first married Anna, or Aldona Ona, the daughter of Grand Duke Gediminas of Lithuania. The daughters from this marriage were Cunigunde (d. 1357), who was married to Louis VI the Roman, the son of Louis IV, Holy Roman Emperor, and Elisabeth, who was married to Duke Bogislaus V of Pomerania. Aldona died in 1339, and Casimir then married Adelaide of Hesse. He divorced Adelaide in 1356, married Christina, divorced her, and while Adelaide and possibly Christina as well were still alive (ca. 1365), married Hedwig of Głogów and Sagan. His three daughters by his fourth wife were very young at their father's death, and regarded as of dubious legitimacy because of Casimir's bigamy. Because all of the five children he fathered with his first and fourth wife were daughters, Casimir left no lawful male heir to his throne.
When Casimir, the last Piast king of Poland, died in 1370 from an injury received while hunting, his nephew King Louis I of Hungary succeeded him to become king of Poland in personal union with Hungary. ...more