page_title: Frankfurt
section_title: International relations
hierarchical_section_title: Frankfurt / Politics / International relations
caption_attribution_description: Frankfurt, Germany - Partner Cities
context_page_description: Frankfurt is a metropolis and the largest city of the German state of Hesse. Its 753,056 inhabitants make it the fifth-largest city in Germany. On the River Main, it forms a continuous conurbation with the neighbouring city of Offenbach am Main and its urban area has a population of 2.3 million. The city is at the centre of the larger Rhine-Main Metropolitan Region, which has a population of 5.5 million and is Germany's second-largest metropolitan region after the Rhine-Ruhr Region. Frankfurt's central business district lies about 90 km northwest of the geographic centre of the EU at Gadheim, Lower Franconia. Like France and Franconia, the city is named after the Franks. Frankfurt is the largest city in the Rhine Franconian dialect area.
  Frankfurt was a city state, the Free City of Frankfurt, for nearly five centuries and was one of the most important cities of the Holy Roman Empire, as a site of imperial coronations; it lost its sovereignty upon the collapse of the empire in 1806, regained it in 1815 and then lost it again in 1866, when it was annexed by the Kingdom of Prussia. It has been part of the state of Hesse since 1945.
context_section_description: Frankfurt is twinned with:
  
  
   
   Lyon, Auvergne-Rhône-Alpes, France (since 1960)
   Birmingham, West Midlands, England, United Kingdom (1966)
   Milan, Lombardy, Italy (1970)
   Guangzhou, China (1988)
   Prague, Czechia (1990)
   
   Budapest, Hungary (1990)
   San Pedro Sula, Honduras (1991)
   Yokohama, Japan (2011)
   Eskişehir, Turkey (2012)
   Philadelphia, Pennsylvania, United States (2015)
caption: Frankfurt twin towns as of 2005
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