Władysław Opolski
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Władysław Opolski (1225-1282), Duke of Kalisz (1234-1244), Duke of Wieluń (1234-1249), Duke of Opole and Racibórz since 1246. Until 1241 under protectorate of Dukes of Silesia. Władysław, son of Kazimierz I Opolski, and a grandson of Mieszko IV of Poland, was of Polish Piast dynasty.