Boleslaus II the Generous/the Bold duke and king of Poland 1058-1079 (crowned 1076).
He supported pope Gregory VII in his struggle with the Emperor, but had the Bishop of Krakow St. Stanislaus put to death as a traitor. The king was forced into exile and Ladislaus Herman of Poland, 1079-1102, became duke of Poland. After him, two brothers, Zbigniew and Boleslaus, ruled jointly from 1102-1107.
Casimir I of Poland
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Ladislaus Herman of Poland