Oldenburg_(city)

Oldenburg (German pronunciation: [ˈɔldn̩bʊʁk] ) is an independent city in the state of Lower Saxony, Germany. The city is officially named Oldenburg (Oldb) (Oldenburg in Oldenburg) to distinguish from Oldenburg in Holstein.
During the French annexation (1811–1813) in the wake of the Napoleonic war against Britain, it was also known as Le Vieux-Bourg in French. The city is at the rivers Hunte and Haaren, in the northwestern region between the cities of Bremen in the east and Groningen (Netherlands) in the west. It has a population of 170,000 (November 2019). Oldenburg is part of the Northwest Metropolitan Region, with 2.37 million people.
The city is the place of origin of the House of Oldenburg. Before the end of the German Empire (1918), it was the administrative centre and residence of the monarchs of Oldenburg.