The capital resolution (German: Hauptstadtbeschluss) was made by the German Bundestag on 20 June 1991, as a result of German reunification, to move its headquarters, as well as the headquarters of half the federal ministries, from Bonn to Berlin. Ministries which remained in Bonn, such as the Federal Ministry of Defence, set shop in Berlin with a second office, likewise the seats in Bonn turned to second offices for ministries which moved to Berlin.
The term capital resolution is misleading, since Berlin had already become the capital of the Federal Republic of Germany in 1990 as one of the stipulations of the Unification Treaty, and the resolution really was about seat of government.[1]