Vienna is the capital of Austria and also one of the nine Austrian provinces. With over 1.7 million people, Vienna is the most populous city in Austria. In the Vienna area with about 2.4 million people live more than a quarter of all Austrians. Relative to its population of Vienna is the ninth largest city in the European Union. Vienna is an international congress venue. The United Nations Office in Vienna (UNRISD) is home to one of the four headquarters of United Nations (UN). Other major international organizations based in Vienna, the Organization of Petroleum Exporting Countries (OPEC), the Organization for Security and Cooperation in Europe (OSCE) and the International Atomic Energy Agency (IAEA). The IAEA is also in the building complex of the Vienna International Centre (VIC), commonly known as UNO City known accommodated. Because of its international political significance Vienna ranks among the world’s cities.
The city of Vienna was for centuries the imperial capital and imperial residence of the Habsburgs and thus as the capital of the Holy Roman Empire, a cultural and political center of Europe. As the fourth largest city in the world after London, New York and Paris to Vienna in 1910 counted more than two million inhabitants. After the First World War, however, Vienna had lost about a quarter of its inhabitants. The old town of Vienna, of the Habsburg’s reign is marked, and the Schonbrunn Palace were by the UNESCO as a World Heritage Site recognized. The St. Stephen’s Cathedral, next to the Ferris wheel in the Prater, and other attractions a landmark of Vienna, overlooked as one of the tallest buildings in the city and as a Metropolitan Church downtown.
Vienna is a city with the highest quality of life assessed globally. Due to the international Mercer study of 29 November 2011, in which the quality of life in 221 cities was compared, was known to Vienna occupies the third consecutive year ranked first, followed in second place of Zurich in Switzerland and in third place of Auckland in New Zealand.