Vienna is the capital and largest city of Austria with about 2.6 mio people within the metropolitan area. Vienna is host to many major international organizations, including the United Nations and OPEC.

Apart from being regarded as the City of Music because of its musical legacy, Vienna is also said to be "The City of Dreams" because it was home to the world's first psycho-analyst: Sigmund Freud.

The city's roots in early Celtic and Roman settlements that transformed into a Medieval and Baroque city, and then the capital of the Austro-Hungarian Empire. It is well known for having played an essential role as a leading European music center, from the great age of Viennese Classicism through the early part of the 20th century.

The historic center of Vienna is rich in architectural ensembles, including Baroque castles and gardens, and the late-19th-century Ringstrasse lined with grand buildings, monuments and parks.

Vienna is also known for its high quality of life. In a 2005 study of 127 world cities, the Economist Intelligence Unit ranked the city first for the world's most livable cities. Since then, it has been awarded numerous times.