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Bolesław I of Masovia ( Polish: Bolesław I Mazowiecki; 1208 – ca. 25 February 1248), was Polish prince member of the Polish House of Piast, Duke of Sandomierz (only a part) during 1229-1232, Duke of Dobrzyń during 1233-1247 and Duke over whole Masovia during 1247-1248. He was the second son of Konrad I of Masovia and Agafia of Rus.
- 1208
- Gertrude of Silesia, Anastasia Alexandrovna of Belz
- ca. 25 February 1248
- Piast dynasty
Duchy of Masovia [a] was a district principality and a fiefdom of the Kingdom of Poland, existing during the Middle Ages. [1] [2] The state was centered in Mazovia in the northeastern Kingdom of Poland, and during its existence, its capital was located in the Płock, Czersk and Warsaw. It was formed in 1138 from the territories of the Kingdom ...
- District principality
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Płock formed the main division of the duchy under his son, Bolesław I. The other division was Czersk. 1234 - 1248: Bolesław I: Son of Konrad I. First duke of Mazovia (in Płock). 1248 - 1262: Ziemowit I / Siemowit I: Brother. 1262 - 1264: Prejeslawa: Widow of Ziemowit and regent. 1262 - 1313: Bolesław II Płocki: Duke of Mazovia. 1288 - 1289
Apr 18, 2024 · Bolesław I (born 966/967—died June 17, 1025) was the duke (from 992) and then (from 1024) first king of Poland, who expanded his country’s territory to include Pomerania, Lusatia, and, for a time, the Bohemian princely lands.
- The Editors of Encyclopaedia Britannica
Bolesław I of Masovia (Polish: '''Bolesław I Mazowiecki'''; 1208 – ca. 25 February 1248), was Polish prince member of the Polish House of Piast, Duke of Sandomierz (only a part) during 1229-1232, Duke of Dobrzyń during 1233-1247 and Duke over whole Masovia during 1247-1248. He was the second son of Konrad I of Masovia and Agafia of Rus.
Bolesław IV of Warsaw (Polish: Bolesław IV warszawski; c. 1421 – 10 September 1454), was a Polish prince and member of the House of Piast in the Masovian branch. He was Duke of Warsaw during 1429–1454 (under regency until 1436) and sovereign Duke of Podlachia in 1440–1444.
Bolesław II of Masovia or Bolesław II of Płock (pl: Bolesław II mazowiecki (płocki); ca. 1253/58 – 20 April 1313), was a Polish prince, member of the House of Piast, Duke of Masovia during 1262-1275 jointly with his brother, after 1275 sole ruler over Płock, after 1294 ruler over all Masovia and Duke of Kraków and Sandomierz during ...
