Casimir II

Casimir II (born 1138—died May 5, 1194) was the duke of Kraków and of Sandomierz from 1177 to 1194. A member of the Piast dynasty, he drove his brother Mieszko III from the throne and spent much of his reign fighting him. Mieszko actually regained power briefly in 1190–91, retaking Kraków. Casimir became Poland’s most powerful ruler and, at the Congress of Lenczyca (1180) was so recognized by the nobility and clergy, who, in exchange...