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With the death of Konrad I on 31 August 1247, new horizons opened for Bolesław I. In his father's will, he received most of
Masovia; shortly after, he had to face an attack of his brother Casimir I, because he was dissatisfied with his portion of their paternal inheritance. However, before the open
234:. This distribution of lands must be only temporary, because it was implicit that after the death of their father, the three surviving brothers (Bolesław I, Casimir I and Siemowit I) had to make a new equitable re-distribution of the lands.
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With no offspring from any of his marriages, in his will Bolesław I bequeathed all his possessions to his younger brother
Siemowit I. This however annoyed Casimir I, and soon the war continued between the surviving brothers.
196:(High Duke of Poland from 1232 to 1238) and the invasion of Masovia by Prussians forced to Konrad I to abandon his plans; in addition, Henry I was able to take control of the entire Duchy of
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286:, Prince of Volhynia and Bielsk). They had no children. After her husband's death, she remarried with a Hungarian magnate called Demetri, probably member of the
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From a young age, Bolesław I became part of the ambitious political projects of his father. In 1227, after the assassination of the High Duke of Poland
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Between 1245 and July 1247, Bolesław I married secondly with his first cousin once removed
Anastasia, daughter of Alexander Vsevolodich, Prince of
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until 1229, when Konrad I finally forced
Grzymisława to surrender to Bolesław I a part of the Duchy of Sandomierz, the district of
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To compensate for the loss of the Duchy of
Sandomierz, Konrad I offered his son parts of Masovia, with the district of
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and thus being more important for his father in his fights for the throne of Kraków), while his other brother
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war began, Bolesław I died unexpectedly during the spring of 1248 (probably around 25 February).
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By 1232 Bolesław I married firstly with
Gertrude (1218/20 – 23/30 April 1244/47), daughter of
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In subsequent years, Bolesław I attacked his
Prussian and Russian neighbors. He supported the
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In 1231, Bolesław I became involved with his father and brothers in the installation of the
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as the capital. Nevertheless, Konrad I retained control of foreign policy and of the army.
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to participate in negotiations on the succession with his widow
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Documentary archive about the reign of Bolesław I of
Masovia
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In 1234, Boleslaw received the north of
Masovia of the
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118:(only a part) during 1229–1232, Duke of
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32:Seal of Boleslaw I of Masovia
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409:Bolesław the Chaste
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316:Casimir II the Just
194:Henry I the Bearded
131:Konrad I of Masovia
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69:Gertrude of Silesia
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55:Noble family
463:1248 deaths
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159:Grzymisława
447:Categories
435:Siemowit I
429:1247–1248
404:1229–1232
345:References
288:Aba family
216:Bug Rivers
198:Sandomierz
171:Siemowit I
116:Sandomierz
114:, Duke of
20:Bolesław I
230:received
228:Casimir I
66:Spouse(s)
418:Konrad I
331:Archived
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220:Sieradz
212:Vistula
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124:Masovia
120:Dobrzyń
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262:Kraków
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102:Polish
86:Mother
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298:Notes
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