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Duchy of Sieradz

From Wikipedia, the free encyclopedia

Duchy of Sieradz
Duchy of Siradia
Księstwo sieradzkie (pl)
ducatus Siradiae (la)
Coat of arms
Poland 1275-1300, Sieradz marked in violet
Poland 1275-1300, Sieradz marked in violet
StatusProvince of Poland
Fiefdom of the Polish Crown (from 1306)
Roman Catholic
Historical eraMiddle Ages
• Established
• Ruled by Bohemia
• Vassalized by the Polish Crown
• Incorporated by Poland
Preceded by
Succeeded by
Duchy of Kuyavia
Sieradz Voivodeship

The Duchy of Sieradz (Latin: ducatus Siradiae, Polish: Księstwo Sieradzkie), also known as the Duchy of Siradia,[1] 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.

The importance of the territory is reflected in the Latin title of Polish kings: nec non terrarum Cracovie, Sandomirrie, Lancicie, Cuyavie, Syradziensis dux.

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Dukes of Sieradz


  1. ^ Rymut, Kazimierz (1987). Nazwy miast Polski. II, uzupełnione. Wrocław – Warszawa – Kraków – Gdańsk – Łódź: Zakład Narodowy im. Ossolińskich. p. 216. ISBN 8304024365.

This page was last edited on 15 August 2021, at 15:20
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