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 Württemberg ended in 1806.
Duchy of Neopatria ended in 1390.
Duchy of Zator ended in 1919.
Duchy of Silesia ended in 1918.
Duchy of Limburg ended in 1794.
Duchy of Salzburg ended in 1918.
Duchy of Ferrara ended in 1597.
Duchy of Holstein ended in 1866.
Duchy of Jülich ended in 1815.