The official name of Luxembourg is the Grand Duchy of Luxembourg.
The Grand Duchy of Pontevedro.
Luxembourg City is the capital of the Grand Duchy of Luxembourg.
Grand Duchy of Baden ended in 1918.
Grand Duchy of Baden was created in 1806.
The Grand Duchy of Karameikos was created in 1987.
Grand Duchy of Berg was created in 1807.
Grand Duchy of Berg ended in 1813.
Grand Duchy of Westarctica was created in 2001.
Grand Duchy of Hesse ended in 1918.
Grand Duchy of Hesse was created in 1806.
Grand Duchy of Tuscany was created in 1569.