# Wenzeslawa (b. ca. 1226/28? – d. 1 July aft. 1230?), a nun in Czarnowąsy.
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Casimir I died suddenly on 13 May 1230 (although some historians put his death one year earlier) and was buried in the still unfounded Czarnowąsy monastery, which was generously patronized by him.
Upon the death of his cousin Duke Casimir I of Opole, son of Mieszko I Tanglefoot, in 1230, he acted as guardian of his minor nephews, thereby once again ruling over whole Silesia.
Casimir IV Jagiellon | Opole | Opole Voivodeship | Casimir III the Great | John Casimir | Hendrik Casimir | Casimir Pulaski | Casimir III | Casimir Gzowski | John II Casimir Vasa | Casimir IV | Casimir | Saint Casimir | Pokój, Opole Voivodeship | Pierre Louis Jean Casimir de Blacas | Casimir V, Duke of Pomerania | Casimir I of Opole | Casimir Ehrnrooth | Theos Casimir Bernard | Prince Frederick Henry and Count Ernst Casimir during the Siege of 's-Hertogenbosch | Popielów, Opole Voivodeship | Pietrowice, Opole Voivodeship | Opole University | Odra Opole | Nowa Kuźnia, Opole Voivodeship | Nicholas I of Opole | Lednica, Opole Voivodeship | Łaziska, Opole Lubelskie County | Lasowice Małe, Opole Voivodeship | Klucz, Opole Voivodeship |
Mieszko's son Casimir I of Opole, Duke from 1211, invited German settlers immigrating to his duchy in the course of the Ostsiedlung, and granted German town law to settlements like Leśnica, Ujazd, Gościęcin, Biała and Olesno.