Duchy of Warsaw ended in 1813.
Duchy of Warsaw was created in 1807.
Duchy of Warsaw.
The Congress gave the Duchy of Warsaw and Finland to Russia.
Duchy of Silesia ended in 1918.
Duchy of Zator ended in 1919.
Duchy of Limburg ended in 1794.
Duchy of Friuli ended in 828.
Duchy of Württemberg ended in 1806.
Duchy of Oels ended in 1884.
Duchy of the Archipelago ended in 1579.
Duchy of Bytom ended in 1498.
Duchy of Nysa ended in 1850.