Frankfurt am Main (/ˈfræŋkfərt/; German pronunciation: [ˈfʁaŋkfʊɐ̯t am ˈmaɪ̯n] (
listen)), commonly known as Frankfurt, is the largest city in the German state of Hesse and the fifth-largest city in Germany, with a 2012 population of 687,775.  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. Since the enlargement of the European Union in 2013, the geographic centre of the EU is about 40 km (25 mi) east of Frankfurt.