Casimir II the Just

Casimir II the Just
High Duke of Poland
Tenure	1177–1191 1191–1194
Predecessor	Mieszko III
Successor	Leszek the White
Duke of Masovia
Tenure	1186–1194
Predecessor	Leszek
Successor	Leszek I the White
Born	28 October 1138
Died	5 May 1194 (aged 55) Kraków
Burial	Wawel Cathedral, Kraków
Spouse	Helena of Znojmo
Issue more...	Adelaide Leszek I the White Konrad I of Masovia
House	Piast dynasty
Father	Bolesław III Wrymouth
Mother	Salomea of Berg
Religion	Roman Catholic

Casimir II the Just (Polish: Kazimierz II Sprawiedliwy; 28 October 1138 – 5 May 1194) was a Lesser Polish Duke of Wiślica from 1166 to 1173, and of Sandomierz after 1173. He became ruler over the Polish Seniorate Province at Kraków and thereby High Duke of Poland in 1177; a position he held until his death, though interrupted once by his elder brother and predecessor Mieszko III. In 1186 Casimir also inherited the Duchy of Masovia from his nephew Leszek, becoming the progenitor of the Masovian branch of the royal Piast dynasty, and great-grandfather of the later Polish king Władysław I the Elbow-high. The honorific title "the Just" was not contemporary and first appeared in the 16th century.