Back Княжество Биркенфелд Bulgarian Knížectví Birkenfeld Czech Fyrstendømmet Birkenfeld Danish Fürstentum Birkenfeld German Πριγκιπάτο του Μπίρκενφελντ Greek Principauté de Birkenfeld French Vorstendom Birkenfeld Dutch Furstendömet Birkenfeld Swedish Thân vương quốc Birkenfeld Vietnamese
The Principality of Birkenfeld (German: Fürstentum Birkenfeld), known after 1919 as the Region of Birkenfeld (German: Landesteil Birkenfeld), was an exclave of the Grand Duchy and then the Free State of Oldenburg from 1817 until 1937, when it was incorporated into Prussia. It was located in the Nahe region on the left bank of the Rhine river and its capital was Birkenfeld. The government was led by a Government-President (Regierungspräsident) who was appointed by the government of Oldenburg.