Mieszko IV Tanglefoot (ca.

1130 – 16 May 1211) is a Duke of Silesia from 1163 to 1173 (with his brother as co-ruler), Duke of Racibórz from 1173, Duke of Opole from 1202 and from June 9, 1210 until his death, Duke of Kraków and High Duke of Poland.

He is the second son of Władysław II the Exile by his wife Agnes of Babenberg, daughter of Margrave Leopold III of Austria and half-sister of King Conrad III of Germany.

His nickname "Tanglefoot" (Plątonogi) appears in the early chronicles of the 14th and 15th centuries.

By the year 1192, the following is written: "Cracovia civitas est devastate a Mescone loripede dicto Platonogi nepote ducis Kazimiriensis Filio Wladislai exulis" ("Monumenta Poloniae Historica," ed.

Bielowski August, t.II, Lviv 1872, p. 876).

This is the oldest preserved record of the Mieszko's nickname in the form of "Plątonogi".