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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.
Bolesław I mazowiecki (sandomierski) (ur. ok. 1208, zm. po 25 lutego w 1248) – książę sandomierski 1229-1232 (nad częścią księstwa), od 1233 w północnym Mazowszu (na północ od Bugu i Wisły, także w Dobrzyniu), od 1247 w całym Mazowszu prawobrzeżnym.
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, since 1275 sole ruler over Płock, since 1294 ruler over all Masovia and Duke of Kraków and Sandomierz during 1288-1289.
Bolesław I of Masovia was born in 1208, to Konrad I of Masovia and Agafia of Rus. Bolesław passed away in 1248, at age 40. Boleslaw III Prince of Plock Mazovia, Circa 1322 - 1341 Boleslaw III Prince of Plock Mazovia 1322 1341
Bolesław já Masovia ( polský: Boleslava I. Mazowiecki, 1208 - cca 25 února 1248), byl polský kníže členem polského domu Piast, vévoda Sandomierz (pouze část), během 1229-1232, vévoda Dobrzyń během 1233- 1247 a Duke po celé Masovia během 1247-1248.
Bolesław I (c. 1210 – 17 April 1248), Duke of Masovia. Casimir I (c. 1210/13 – 14 December 1267), Duke of Kuyavia. Siemowit I (c. 11215 – 24 June 1262), succeeded eldest brother as Duke of Masovia. Eudoxia (b. c. 1215-1225), married Count Dietrich I of Brehna and Wettin; Ludmila, probably a norbertine nun at Płock.
Boleslaw I of Masovia (c. 1210 – 17 April 1248), Duke of Masovia (1247–1248) Casimir I of Kuyavia (born between 1210 and 1213 – died 14 Dec 1267) Prince of Kuyavia (1247–1267) Siemowit I of Masovia (c.1213 – 24 June 1262), succeeded eldest brother as Duke of Masovia (1248–1262)
Mar 12, 2019 · Konrad I of Masovia. From Wikipedia, the free encyclopedia. Konrad I of Masovia (Polish: Konrad I Mazowiecki; 1187? – 1247), son of Casimir II and Helen of Moravia, was the 6th Duke of Masovia. After his father's death in 1194, Konrad was brought up by his mother. In 1199 he received Masovia and in 1202, Kuyavia.
Duke of Masovia (Polish: Książę Mazowsza) was a title born by the sons and descendants of the Polish Duke Bolesław III Wrymouth.In accordance with the last will and testament of Bolesław, upon his death his lands were divided into four to five hereditary provinces distributed among his sons, and a royal province of Kraków reserved for the eldest, who was to be High Duke of all Poland.