Grand Duchy of Oldenburg

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Grand Duchy of Oldenburg Großherzogtum Oldenburg (German)
1815–1918
Flag Coat of arms
The Grand Duchy of Oldenburg within the German Empire
Status	State of the German Confederation, the North German Confederation, and the German Empire
Capital	Oldenburg
Religion	Evangelical Lutheran Church of Oldenburg
Government	Constitutional monarchy
Grand Duke
• 1815–1823	Wilhelm
• 1823–1829	Peter I
• 1829–1853	Augustus
• 1853–1900	Peter II
• 1900–1918	Frederick Augustus II
Staatsminister
• 1814–1842	Karl von Brandenstein (first)
• 1916–1918	Franz Friedrich Ruhstrat (last)
History
• Congress of Vienna	1815
• German Revolution	9 November 1918
Currency	Thaler (until 1858) Vereinsthaler (1858–1873) German Goldmark (1873–1914) German Papiermark (1914–1918)
Preceded by Succeeded by First French Empire Duchy of Oldenburg Free State of Oldenburg
Today part of	Germany

The Grand Duchy of Oldenburg (German: Großherzogtum Oldenburg, also known as Holstein-Oldenburg) was a grand duchy within the German Confederation, North German Confederation and German Empire that consisted of three widely separated territories: Oldenburg, Eutin and Birkenfeld. It ranked tenth among the German states and had one vote in the Bundesrat and three members in the Reichstag.^[1]

Its ruling family, the House of Oldenburg, also came to rule in Denmark, Norway, Sweden, Greece, Russia^[2] and United Kingdom.