Siemowit I of Masovia
Duke of Masovia / From Wikipedia, the free encyclopedia
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Siemowit I of Masovia (Polish: Siemowit (Ziemowit) I mazowiecki) (d. 23 June 1262), was a Polish prince member of the House of Piast, Duke of Czersk during 1247–1248, Duke of Masovia (except Dobrzyń) during 1248–1262, ruler over Sieradz during 1259–1260.
Quick Facts Duke of Masovia, Reign ...
Siemowit I | |
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Duke of Masovia | |
Reign | 1248–1262 |
Predecessor | Bolesław I of Masovia |
Successor | Konrad II of Masovia |
Died | 23 June 1262 |
Spouse | Pereyaslava of Halych |
Issue | Konrad II of Masovia Bolesław II of Masovia Salomea |
House | House of Piast |
Father | Konrad I of Masovia |
Mother | Agafia of Rus |
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He was the sixth son of Konrad I of Masovia and his wife Agafia of Rus.[1]