The Austrian Empire (German: Kaisertum Österreich) was a modern era successor empire, which was centered on what is today's Austria and which officially lasted from 1804 to 1867. It was followed by the Empire of Austria-Hungary, whose proclamation was a diplomatic move that elevated Hungary's status within the Austrian Empire as a result of the Austro-Hungarian Compromise of 1867. The Austro-Hungarian Empire (1867 to 1918) was itself dissolved by the victors at the end of World War I and broken into separate new states.
The term "Austrian Empire" is also used for the Habsburg possessions before 1804, which had no official collective name, although Austria is more frequent; the term of Austria-Hungary has also been used.
The Austrian Empire was founded by the Habsburg monarch Holy Roman Emperor Francis II (who became Emperor Francis I of Austria), as a state comprising his personal lands within and outside of the Holy Roman Empire of the German Nation.
This was a reaction to Napoleon Bonaparte's proclamation of the First French Empire in 1804.
Vienna ( /viːˈɛnə/; German: Wien [viːn]) is the capital and largest city of the Austria and one of the nine states of Austria. Vienna is Austria's primary city, with a population of about 1.723 million (2.4 million within the metropolitan area, more than 25% of Austria's population), and is by far the largest city in Austria, as well as its cultural, economic, and political centre. It is the 9th-largest city by population in the European Union. Vienna is host to many major international organizations, including the United Nations and OPEC. The city lies in the east of Austria and is close to the borders of the Czech Republic, Slovakia, and Hungary. These regions work together in a European Centrope border region. Along with nearby Bratislava, Vienna forms a metropolitan region with 3 million inhabitants, and this region is referred to as Twin City.[citation needed] In 2001, the city centre was designated a UNESCO World Heritage Site.