(Redirected from
Dukes of Sieradz)
From 1138 to 1228, part of the Duchy of Cracow and Sandomierz, belonging to the high-dukes of Poland.
after 1305 parts of the united Kingdom of Poland initially as two vassal duhies, later incorporated as Leczyca Voivodship and Sieradz Voivodship.
After 1305 part of the united Kingdom of Poland as a vassal duchy, later after 1339 incorporated by the king Casimir III the Great as the Sieradz Voivodship
After 1305 part of the united Kingdom of Poland as a vassal duchy, later after 1343 incorporated by the king Casimir III the Great as the Leczyca Voivodship
