East Berlin was the capital of East Germany (GDR) from 1949 to 1990. From 1945, it was 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.