The Weimar Republic (German: Weimarer Republik [ˌvaɪ̯maʁɐ ʁepuˈbliːk]), officially named the German Reich, was the government of Germany from 1918 to 1933, during which it was a constitutional federal republic for the first time in history; hence it is also referred to, and unofficially proclaimed itself, as the German Republic (Deutsche Republik). The state's informal name is derived from the city of Weimar, which hosted the constituent assembly that established its government. In English, the state was usually simply called "Germany", with "Weimar Republic" (a term introduced by Adolf Hitler in 1929) not commonly used until the 1930s.