History of Austria
Austria was dominated by the House of Habsburg and House of Habsburg-Lorraine ("Haus Österreich") from 1273 to 1918. In 1808, when Emperor Francis II of Austria dissolved the Holy Roman Empire, Austria became the Austrian Empire, and was also part of the German Confederation until the Austro-Prussian War of 1866. In 1867, Austria formed a dual monarchy with Hungary: the Austro-Hungarian Empire (1867–1918). When this empire collapsed after the end of World War I in 1918, Austria was reduced to the main, mostly German-speaking areas of the empire (its current frontiers), and adopted the name The Republic of German-Austria. However the union and name were forbidden by the Allies at the Treaty of Versailles. This led to the creation of the First Austrian Republic (1918-1933).
Austria
This left the responsibility for the end of the war, on 3 November 1918, solely to the emperor and his government. On 11 November, the emperor, advised by ministers of the old and the new governments, declared he would not take part in state business any more; on 12 November, German Austria, by law, declared itself to be a democratic republic and part of the new German republic. The constitution, renaming the "Staatsrat" as "Bundesregierung" (federal government) and "Nationalversammlung" as "Nationalrat" (national council) was passed on 10 November 1920.