East Berlin was the partially recognised capital city of East Germany (GDR) from 1948 to 1990, although in 1945, it was recognised by the Three Powers as the Soviet occupation sector of Berlin. The American, British, and French sectors were known as West Berlin. From 13 August 1961 until 9 November 1989, East Berlin was separated from West Berlin by the Berlin Wall. The Western Allied powers did not recognize East Berlin as the GDR's capital, nor the GDR's authority to govern East Berlin. For most of its administrative existence, East Berlin was officially known as Berlin, capital of the GDR by the GDR government. On 3 October 1990, the day Germany was officially reunified, East and West Berlin formally reunited as the city of Berlin.

East Germany, officially known as the German Democratic Republic, was a country in Central Europe from its formation on 7 October 1949 until its reunification with West Germany on 3 October 1990. Until 1989, it was generally viewed as a communist state and described itself as a socialist "workers' and peasants' state". The economy of this country was centrally planned and state-owned. Although the GDR had to pay substantial war reparations to the Soviets, it became the most successful economy in the Eastern Bloc.