The Duchy of Sieradz ( la, ducatus Siradiae, pl, Księstwo Sieradzkie), also known as the Duchy of Siradia, was one of the territories created during the period of the fragmentation of Poland. It was originally part of the central

Seniorate Province Seniorate Province, also known as the Senioral Province, , was a district principality in the Duchy of Poland that was formed in 1138, following the fragmentation of the state. Its ruler held the title of the High Duke, ruling all duchies wit ...

, but became separated upon the death of High Duke

Władysław III Spindleshanks : ''This article refers to the 12th-century Polish monarch. For the 15th-century Jagiellon monarch, see Władysław III of Poland, and for other monarchs with similar names see Ladislaus III (disambiguation)''. Władysław III Spindleshanks ( pl, W ...

in 1231, ruled by the rivaling Masovian branch of the

Piast dynasty The House of Piast was the first historical ruling dynasty of Poland. The first documented Polish monarch was Duke Mieszko I (c. 930–992). The Piasts' royal rule in Poland ended in 1370 with the death of king Casimir III the Great. Branch ...

. 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 The Přemyslid dynasty or House of Přemyslid ( cs, Přemyslovci, german: Premysliden, pl, Przemyślidzi) was a Bohemian royal dynasty that reigned in the Duchy of Bohemia and later Kingdom of Bohemia and Margraviate of Moravia (9th century–130 ...

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 Sieradz Voivodeship () was a unit of administrative division and local government in Poland in the years 1975–1998, superseded by Łódź Voivodeship. A Voivodeship is an area administered by a voivode (Governor), and the Sieradz Voivodeshi ...

. Around that time, the term

Sieradz Land Sieradz Land or Siradia ( pl, Ziemia Sieradzka) is a historical region of Poland, the southeastern part of Greater Poland. It has been also the name of the administrative unit from 14th-18th centuries (former Duchy of Sieradz) of the same border ...

(''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''.

Dukes of Sieradz

* 1231–1233 Konrad I of Masovia * 1233–1234 Boleslaus I of Masovia, son ** 1234–1247 Konrad I of Masovia, again ** 1247–1259

Casimir I of Kuyavia Casimir I of Kuyavia ( pl, Kazimierz I kujawski) (c. 1211 – 14 December 1267) was a Polish prince and a member of the House of Piast. He was Duke of Kujawy after 1233, ruler over Ląd from 1239-1261, ruler over Wyszogród after 1242, Duke of Si ...

, son, younger brother of Boleslaus ** 1259–1260

Siemowit I of Masovia Siemowit I of Masovia ( pl, Siemowit (Ziemowit) I mazowiecki) (d. 23 June 1262), was a Polish prince member of the House of Piast, Duke of Czersk during 1247-1248, Duke of Masovia (except Dobrzyń) during 1248-1262, ruler over Sieradz during 1259 ...

, younger brother of Casimir ** 1260–1261 Casimir I of Kuyavia, again * 1261–1288 Leszek II the Black, son of Casimir, also

Duke of Kraków Seniorate Province, also known as the Senioral Province, , was a district principality in the Duchy of Poland that was formed in 1138, following the fragmentation of the state. Its ruler held the title of the High Duke, ruling all duchies wit ...

from 1279 ** 1288–1299 Władysław I the Elbow-high, younger half-brother, Duke of Kraków from 1306,

King of Poland Poland was ruled at various times either by dukes and princes (10th to 14th centuries) or by kings (11th to 18th centuries). During the latter period, a tradition of free election of monarchs made it a uniquely electable position in Europe (16t ...

from 1320 * 1299–1305 King Wenceslaus II of Bohemia, Duke of Kraków from 1291,

from 1300 * 1305–1306 King Wenceslaus III of Bohemia, also King of Poland **1306–1327 Władysław I the Elbow-high, again, also Duke of Kraków from 1306, King of Poland from 1320 * 1327–1339

Przemysł of Inowrocław Przemysł of Inowrocław (pl: ''Przemysł inowrocławski''; ca. 1278 – November 1338/16 February 1339), was a Polish prince member of the House of Piast, Duke of Inowrocław during 1287-1314 (under the regency of his mother until 1294 and his bro ...

, son of Duke Ziemomysł of Kuyavia

References

{{DEFAULTSORT:Sieradz, Duchy of

Duchy of Sieradz The Duchy of Sieradz ( la, ducatus Siradiae, pl, Księstwo Sieradzkie), also known as the Duchy of Siradia, was one of the territories created during the period of the fragmentation of Poland. It was originally part of the central Seniorate Provi ...

14th-century disestablishments in Poland History of Poland during the Piast dynasty Duchies of Poland States and territories established in 1231 Fiefdoms of Poland