Kaisertum Österreich (German)
|Anthem: Gott erhalte Franz den Kaiser|
"God Save Emperor Francis"
|Common languages||Austro-Bavarian, German, Hungarian, Czech, Slovak, Polish, Ruthenian, Slovene, Croatian, Serbian, Romanian, Lombard, Venetian, Friulian, Ladin, Italian, Ukrainian, Yiddish|
Lutheranism, Calvinist, Eastern Orthodox, Jewish
|Franz Joseph I|
|Klemens von Metternich (first)|
|Friedrich Ferdinand von Beust (last)|
|House of Lords|
|House of Deputies|
|Historical era||19th century|
|11 August 1804|
|6 August 1806|
|8 June 1815|
|20 October 1860|
|14 June 1866|
|30 March 1867|
|History of Austria|
The Austrian Empire (German: Kaiserthum Oesterreich, modern spelling Kaisertum Österreich) was a Central-Eastern European multinational great power from 1804 to 1867, created by proclamation out of the realms of the Habsburgs. During its existence, it was the third most populous empire in Europe after the Russian Empire and the United Kingdom. Along with Prussia, it was one of the two major powers of the German Confederation. Geographically, it was the third-largest empire in Europe after the Russian Empire and the First French Empire (621,538 square kilometres or 239,977 square miles). Proclaimed in response to the First French Empire, it partially overlapped with the Holy Roman Empire until the latter's dissolution in 1806.
The Kingdom of Hungary—as Regnum Independens—was administered by its own institutions separately from the rest of the empire. After Austria was defeated in the Austro-Prussian War of 1866, the Austro-Hungarian Compromise of 1867 was adopted, joining the Kingdom of Hungary and the Empire of Austria to form Austria-Hungary.