Oldenburg (state)

Flag of the Grand Duchy of Oldenburg from 1871 on

Free State of Oldenburg in the German Reich in 1925

Historic Oldenburg postage stamp

Grand Duchy of Oldenburg – border marker in Hassendorf

Oldenburg is a former state in northwestern Germany whose capital was Oldenburg. The region gained its independence in the High Middle Ages. It survived the Napoleonic Wars as an independent country, formed part of the German Confederation, and was a member state of the German Reich from 1871 to 1946.