Frankfurt am Main ( /ˈfræŋkfərt/; German pronunciation: [ˈfʁaŋkfʊɐt am ˈmaɪn], commonly known simply as Frankfurt, is the largest city in the German state of Hesse and the fifth-largest city in Germany, with a 2011 population of 695,624.The urban area had an estimated population of 2,300,000 in 2010. The city is at the centre of the larger Frankfurt Rhine-Main Metropolitan Region which has a population of 5,600,000 and is Germany’s second-largest metropolitan region.
Frankfurt is the financial and transportation centre of Germany and the largest financial centre in continental Europe. It is seat of the European Central Bank, the German Federal Bank, the Frankfurt Stock Exchange and the Frankfurt Trade Fair, as well as several large commercial banks, e.g. Deutsche Bank, Commerzbank and DZ Bank. Frankfurt Airport is one of the world’s busiest international airports, Frankfurt Central Station is one of the largest terminal stations in Europe, and the Frankfurter Kreuz is one of the most heavily used Autobahn interchanges in Europe. Frankfurt lies in the former American Occupation Zone of Germany, and it was formerly the headquarters city of the U.S. Army in Germany (…wiki)