Duchy of Sieradz
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 Seniorate Province, but became separated in the 13th century. After 1305 part it was reunited with the Kingdom of Poland as a vassal duchy, and after 1339 incorporated by the king Casimir III the Great as the Sieradz Voivodship.
Dukes of Sieradz
- 1233-1234 Boleslaus I of Mazovia (Bolesław I Mazowiecki)
- 1275-1288 Leszek the Black (Leszek Czarny)
- 1288-1294 Władysław I the Elbow-high (Władysław Łokietek )
- 1327-1339 Przemysl of Cuiavia (Przemysł Kujawski)
  | This Polish history–related article is a stub. You can help Wikipedia by expanding it. |