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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. He was the sixth son of Konrad I of Masovia and his wife Agafia of Rus.
May 3, 2024 · Siemowit was the second son of Trojden I of Masovia and his wife Maria, daughter of Yuri I of Galicia. In 1341, following the death of their father and brother, Siemowit and his younger brother Casimir inherited the Duchy of Czersk. In 1345 following the death of their uncle Siemowit II of Rawa, they also inherited the Duchy of Rawa.
Added: Oct 6, 2021. Find a Grave Memorial ID: 232752084. Source citation. Siemowit I of Masovia as 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. He was the sixth son of Konrad I of Masovia and his wife Agafia of Rus.
Sep 7, 2023 · Siemowit receiveed the Warsaw area and Trojden received Czersk. In 1311, Borzysław becomes his Chancellor[2]. 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.
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Jan 28, 2022 · Agafia of Rus. 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. He was the sixth son of Konrad I of Masovia and his wife Agafia of Rus. [1]
Date. 1942–1949. Executed by. Soviet Union. Outcome. The successful development of nuclear weapons. Further escalation of the Cold War. The Soviet atomic bomb project was the classified research and development program that was authorized by Joseph Stalin in the Soviet Union to develop nuclear weapons during and after World War II. [1] [2]
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He is considered to be the first ruler of the Piast dynasty. [1] He became the Duke of the Polans in the 9th century after his father, Piast the Wheelwright, son of Chościsko, refused to take the place of legendary Duke Popiel. Siemowit was elected as new duke by the wiec. [2] According to a popular legend, Popiel was then eaten by mice in his ...
