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He was the third son of Siemowit IV, Duke of Masovia and Alexandra of Lithuania, daughter of Algirdas. Life. As a child, Casimir II was sent to Lithuania, an event that in the future would give him the support of the Grand Duke Vytautas. Also, he spend some time at the court of King Władysław II Jagiełło of Poland.
Summarize this article for a 10 year old. SHOW ALL QUESTIONS. 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.
Siemowit IV (Ziemowit IV), also known as Siemowit IV the Younger (pl: Siemowit IV Młodszy; ca. 1353/1356 – 21 January 1426), was a Polish prince member of the House of Piast from the Masovian branch, from 1373/74 Duke of Rawa, and after the division of the paternal inheritance between him and his brother in 1381, ruler over Rawa, Płock, Sochaczew, Gostynin, Płońsk and Wizna, since 1386 ...
Sep 7, 2023 · Boleslaus II of Mazovia died on April 20, 1313. In 1279 he married firstly to Sophia, the daughter of Grand Duke Treniota of Lithuania, they had the following children: 1. Siemowit II of Masovia, Duke of Masovia (1310–1345) 2. Trojden I of Masovia, Duke of Masovia, Czersk and Warsaw (1310–1341) 3.
On 18 March 1390, Henry, thanks to the efforts of his father and brothers (Janusz I, Duke of Masovia, and Siemowit IV, Duke of Masovia), became bishop of Płock, even though he had not received the Holy Orders of the priesthood, as required for that position, and refused to accept ordination.
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Siemowit IV (Ziemowit IV), also known as Siemowit IV the Younger (pl: Siemowit IV Młodszy; ca. 1353/1356 [1] – 21 January 1426 [2]), was a Polish prince member of the House of Piast from the Masovian branch, from 1373/74 Duke of Rawa, and after the division of the paternal inheritance between him and his brother in 1381, ruler over Rawa, Płock, Sochaczew, Gostynin, Płońsk and Wizna ...
