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Siemowit VI of Płock (pl: Siemowit VI płocki; 2 January 1446 - 31 December 1461/1 January 1462), was a Polish prince member of the House of Piast from the Masovian branch. He was a Duke of Płock, Rawa Mazowiecka, Belz, Płońsk, Zawkrze and Wizna during 1455-1461/62 (under regency until 1459) jointly with his brother, since 1459 ruler over ...
Mazovian institutions owed much to Polish models: Siemowit III introduced starostas in the fourteenth century, and ducal power remained strong, even after Mazovia developed a parliamentary culture, with assemblies meeting regularly after 1454 in the various duchies, although essentially they were meetings of the ducal councils and office ...
Siemowit VI of Płock (pl: Siemowit VI płocki; 2 January 1446 - 31 December 1461/1 January 1462), was a Polish prince member of the House of Piast from the Masovian branch. He was a Duke of Płock , Rawa Mazowiecka , Belz , Płońsk , Zawkrze and Wizna during 1455-1461/62 (under regency until 1459) jointly with his brother, since 1459 ruler ...
Czersk and Warsaw are merged into Płock by Ziemowit III / Siemowit III, but his territory is again divided after his death. 1373 - 1429: Janusz I: Son of Ziemowit III of Płock. 1429 - 1454: Bolesław IV: 1454 - 1462: Ziemowit VI / Siemowit VI: Son of Wladyslaw I. Gained Płock (1455). c.1462: Barbara Ruska: Regent of Czersk. c.1462: Paul of ...
Date of birth: 2 January 1446, 11 January 1446: Date of death: 1 January 1462, 10 January 1462: Manner of death
After the death of Siemowit VI on 31 December 1461/1 January 1462, Władysław II became in the sole ruler of their paternal domains; however, because he was still a minor, the regency was taken again by the Dowager Duchess Anna and Bishop Paweł of Płock. Unfortunately, less than a month later, Władysław II also died.
He was buried at Płock Cathedral. Marriage and issue. In 1444 Władysław I married with Anna (ca. 1425? – aft. 15 August 1482), a daughter of Duke Konrad V of Oleśnica. They had two sons: Siemowit VI (2 January 1446 - 31 December 1461/1 January 1462). Władysław II (aft. 31 October 1448 - 27 February 1462).
