Budapest is the capital and the most populous city of Hungary, and one of the largest cities in the European Union.[12][13][14] With an estimated 2016 population of 1,759,407 distributed over a land area of about 525 square kilometres (203 square miles), Budapest is also one of the most densely populated major cities in the EU.[1][15] Budapest is both a city and county, and forms the centre of the Budapest metropolitan area, which has an area of 7,626 square kilometres (2,944 square miles) and a population of 3,303,786, comprising 33 percent of the population of Hungary.[16][17] The Budapest metropolitan area had a GDP of $141.0 billion (€129.4 billion) in 2016, accounting for 49.6 percent of the GDP of Hungary.[18][9] GDP per capita in the city is $64,283, which means 148% of the EU average measured on purchasing power parity.[10] Thereby the city is among the top 100 GDP performing cities in the world[19] and making it one of the largest regional economies in the European Union.
Vienna is the capital and largest city of Austria and one of the nine states of Austria. Vienna is Austria's primary city, with a population of about 1.8 million[1] (2.6 million within the metropolitan area,[4] nearly one third of Austria's population), and its cultural, economic, and political centre. It is the 7th-largest city by population within city limits in the European Union. Until the beginning of the 20th century, it was the largest German-speaking city in the world, and before the splitting of the Austro-Hungarian Empire in World War I, the city had 2 million inhabitants.[11] Today, it has the second largest number of German speakers after Berlin.[12][13] Vienna is host to many major international organizations, including the United Nations and OPEC. The city is located in the eastern part 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.[citation needed] In 2001, the city centre was designated a UNESCO World Heritage Site. In July 2017 it was moved to the list of World Heritage in Danger.[14]
