The Bundestag (German: [ˈbʊndəstaːk] , "Federal Diet") is the federal parliament of Germany. It is the only constitutional body in the country directly elected by the German people. The Bundestag was established by Title III of the Basic Law for the Federal Republic of Germany (Grundgesetz) in 1949 as one of the legislative bodies of Germany, the other being the Bundesrat.
The members of the Bundestag are representatives of the German people as a whole, are not bound by any orders or instructions and are only accountable to their conscience. Since the current 21st legislative period, the Bundestag has a fixed number of 630 members. The Bundestag is elected every four years by German citizens aged 18 and older. Elections use a mixed-member proportional representation system which combines first-past-the-post voting for constituency-seats with proportional representation to ensure its composition mirrors the national popular vote. The German Bundestag cannot dissolve itself; only the president of Germany can do so under certain conditions.