Grand Duchy of Oldenburg

The Grand Duchy of 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 and three members in the . Its ruling family, the House of Oldenburg, also came to rule in Denmark, Norway, Sweden, Greece and Russia. History The Grand Duchy of Oldenburg came into existence in 1815 combining the territory of the old Duchy of Oldenburg with the Principality of Birkenfeld. Whilst Oldenburg was elevated to a grand duchy at the Congress of Vienna, the first two grand dukes continued to style themselves as merely dukes and it was not until 1829 that the newly acceded Augustus used the title of grand duke. Although paternalist, the early grand dukes did not grant a constitution until events overtook them in 1848.