Austria-Hungary (Cherry, Plum, and Chrysanthemum)

Austria-Hungary (also known as the Austro-Hungarian Empire, Austro-Hungarian Monarchy or k.u.k. Monarchy, Dual Monarchy, Danube Monarchy), more formally known as the Kingdoms and Lands Represented in the Imperial Council and the Lands of the Holy Hungarian Crown of Saint Stephen, was a constitutional monarchic union between the crowns of the Austrian Empire and the Kingdom of Hungary in Central Europe, which existed from 1867 to October 1918, following the end of World War I. The union was a result of the Austro-Hungarian Compromise of 1867, under which the House of Habsburg agreed to share power with the separate Hungarian government, dividing the territory of the former Austrian Empire between them. The Austrian and the Hungarian lands became independent entities enjoying equal status.

Austria-Hungary was a multinational realm and one of the world's great powers at the time. Austria-Hungary was geographically the third largest country in Europe after the Russian Empire and Scandinavia (621,538 square kilometres), and the third most populous (after the Russian Empire and the German Empire). The Empire built up the fourth largest machine building industry of the world (after the United States, the German Empire and the United Kingdom).