Mieszko IV Tanglefoot
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Mieszko IV Tanglefoot (Polish: Mieszko IV Plątonogi; Mieszko IV of Racibórz; ca. 1130 – May 16, 1211) was High Duke of Poland from June 9, 1210. He was the second-eldest son of Władysław II the Exile and Agnes of Babenberg.
Mieszko co-ruled (with his elder brother, Bolesław the Tall) the Duchy of Wrocław (1163 – 1173). After the division of that province, Mieszko became Duke of Racibórz.
Mieszko was also Duke of Bytom, Oświęcim (from 1177) and Opole (as Mieszko I Tanglefoot, from 1202).