During the German Revolution of 1918–1919 an "Arbeiter- und Soldatenrat" (Council of the Workers and Soldiers) was formed. From 12 November 1918 to 1919, a chairman was the head of state and city government: Heinrich Lauffenberg (−1919), Carl Hense (1919). This is not mentioned in Domizlaff: "Das Hamburger Rathaus". The period in Germany after the First World War until the takeover of power – by the Nazi Party in 1933 – is called Weimar Republic. The Hamburg Parliament was democratically elected.