Duchy of Wizna | |||||||||||||||||
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| 1345–1351 1381–1382 1435–1495 | |||||||||||||||||
 Flag
 Coat of arms
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 Map of Masovia between 1381 and 1426, with division between lands controlled by Siemowit IV and Janusz I of Warsaw, including Duchy of Wizna. | |||||||||||||||||
| Status | Fiefdom of the Kingdom of Poland (1345–1351, 1381–1382) Fiefdom of the Kingdom of Poland (1435–1495) Personal union with the Duchy of Płock | ||||||||||||||||
| Capital | Wizna | ||||||||||||||||
| Official languages | Polish, Latin | ||||||||||||||||
| Religion | Roman Catholic | ||||||||||||||||
| Government | District principality | ||||||||||||||||
| Duke | |||||||||||||||||
• 1345–1351 (first) | Bolesław III of Płock | ||||||||||||||||
• 1381–1382 (second) | Siemowit IV | ||||||||||||||||
• 1435–1495 (third and last) | Władysław I of Płock | ||||||||||||||||
| Historical era | High Middle Ages | ||||||||||||||||
• Partition from the Duchy of Rawa | 1345 | ||||||||||||||||
• Incorporation into the Kingdom of Poland | 18 September 1351 | ||||||||||||||||
• Partition from Duchy of Masovia | December 1381 | ||||||||||||||||
• Pledge to the State of the Teutonic Order | 2 December 1382 | ||||||||||||||||
• Partition from the Duchy of Warsaw | 1435 | ||||||||||||||||
• Incorporation into the Kingdom of Poland. | 1495 | ||||||||||||||||
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Duchy of Wizna[a] was a district principality and a fiefdom within the United Kingdom of Poland, and later the Crown of the Kingdom of Poland. The country was located in Wizna Land with Wizna as its capital and during its existence it remained in the personal union with the Duchy of Płock.[1][2] It was formed in 1345 from the part of Duchy of Rawa and was ruled by Bolesław III of Płock. On 18 September 1381 it was incorporated into United Kingdom of Poland.[1] It was reestablished in December 1381 from the part of the Duchy of Masovia under Siemowit IV rule. On 2 December 1382 its territory was pledged to the State of the Teutonic Order. It was again re-established in 1435, when it was given to Władysław I of Płock, ruler of the Duchy of Płock, existed until 1495 when it was incorporated into the Crown of the Kingdom of Poland.[2]
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