The Reichstag is both an institutional assembly and a specific building.

• The formal assembly of German feudal and church leaders during the existence of the Holy Roman Empire of the German Nation
• The German parliament from 1871 through 1945; see also Reichstag (institution)

• The Reichstag building near the Brandenburg Gate in Berlin where the Reichstag (the German parliament) met from 1894 to 1933 and the Bundestag (the parliament of the Federal Republic of Germany) now meets, following the post-Soviet reunification and the restoration of the building.

See also: Bundestag, Riksdag