page_title: Frankfurt
section_title: Other
hierarchical_section_title: Frankfurt / Economy and business / Other industries / Other
caption_attribution_description: Deutsch: Industriepark Höchst von der Leunabrücke aus gesehen
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 home to companies from the chemical, the transportation, the telecommunication and the energy industry. Some of the larger companies are:
  Industriepark Höchst — An industrial park in Höchst. It is one of Germany's largest with over 90 companies from the pharmaceutical, the chemical and the biotechnology industry, including Celanese, Clariant, BASF, Merck KGaA and Siemens. It was founded by chemical company Hoechst AG in 1874. At the beginning of the 1980s Hoechst AG was the largest pharmaceutical corporation and Industriepark Höchst was known as "the pharmacy of the world". Hoechst AG merged with Rhône-Poulenc to become Aventis in 1999 and in 2004 Aventis merged with Sanofi-Synthélabo to become Sanofi-Aventis. In 2005, around 22,000 people worked at Industriepark Höchst. In 2011, Ticona now part of Celanese, an international manufacturer of engineering polymers, moved to Industriepark Höchst.
  Deutsche Bahn – Deutsche Bahn subsidiaries DB Fernverkehr, DB Regio, DB Stadtverkehr, DB Netz, DB Schenker and the corporate development department of Deutsche Bahn are Frankfurt-based.
  Deutsche Telekom – Deutsche Telekom's subsidiary T-Systems is Frankfurt-based.
  COLT – Telecommunications company with Frankfurt-based German headquarters.
  CenturyLink — internet service provider with German headquarters in Frankfurt.
  DE-CIX – Frankfurt is an important location for electronic communication, especially the Internet. It is home to DE-CIX, the world's largest internet exchange point, and also the place where domain names are registered for top-level-domain ".de".
  Mainova – The largest regional energy supplier in Germany with about one million customers in Hesse. It provides electricity, gas, heat and water. Its headquarters are Frankfurt-based.
caption: Industriepark Höchst
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