Duchy of Sieradz
| Duchy of Sieradz | ||||||||||
| Księstwo sieradzkie (pl) | ||||||||||
| Province of Poland Fiefdom of the Polish Crown (from 1306) |
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.png) Poland 1275-1300, Sieradz marked in violet
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| Capital | Sieradz | |||||||||
| Religion | Roman Catholic | |||||||||
| Government | Duchy | |||||||||
| Historical era | Middle Ages | |||||||||
| • | Established | 1231 | ||||||||
| • | Ruled by Bohemia | 1299 | ||||||||
| • | Vassalized by the Polish Crown |
1305 | ||||||||
| • | Incorporated by Poland |
1339 | ||||||||
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Coat of arms
The Duchy of Sieradz (Latin: ducatus Siradiae, Polish: Księstwo Sieradzkie) was one of the territories created during the period of the fragmentation of Poland. It was originally part of the central Seniorate Province, but became separated upon the death of High Duke Władysław III Spindleshanks in 1231, ruled by the rivaling Masovian branch of the Piast dynasty.
In 1299 Duke Władysław I the Elbow-high had to cede Sieradz to King Wenceslaus II of Bohemia, who had also obtained the Seniorate Duchy of Kraków in 1291. Nevertheless, upon the extinction of the Bohemian Přemyslid dynasty in 1306, it was reunited with the Kingdom of Poland as a vassal duchy, and after 1339 incorporated by King Casimir III the Great into the Lands of the Polish Crown as Sieradz Voivodship. Around that time, the term Sieradz Land (terra Siradiensi, ziemia sieradzka) begun replacing the older Duchy nomenclature.
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Wikipedia