Category
page 1Duchies of Poland
Duchy of Prussia
historical state (1525–1701)
Duchy of Masovia
Polish Vassal
Duchy of Greater Poland
historical Polish province
Seniorate Province
1138–1227 district principality in Duchy of Poland
Duchy of Belz
volhynian fiefdom under various successive countries
Duchy of Sandomierz
Polish fiefdom of 1138 to 1320
Duchy of Łęczyca
Polish duchy (1231–1352)
Duchy of Sieradz
Polish duchy (1231–1339)
Duchy of Kalisz
Polish duchy (1177–1279)
Duchy of Kuyavia
Polish duchy (1230–1267)
Duchy of Inowrocław
Polish duchy (1267–1364)
Księstwo bydgosko-wyszogrodzkie
Former monarchy in Europe
Duchy of Płock
duchy in Mazovia
Duchy of Czersk
former monarchy in Europe