Frankfurt is the largest city in the German state of Hesse, and is considered the business and financial centre of Germany. It is the fifth largest city in Germany after Berlin, Hamburg, Munich and Cologne. The city is known for its modern skyline, and for hosting the headquarters of the European Central Bank, the Deutsche Börse stock exchange and numerous German financial services companies.
Furthermore, it hosts some of the world's most important trade shows, such as the Frankfurt Auto Show and the Frankfurt Book Fair. Located on the river Main at a crossroad of the German Autobahn system and connected to several high-speed rail lines, with Germany's busiest airport on its outskirts, Frankfurt is one of the most important transportation hubs of Europe.
Frankfurt is a city of contrasts. Wealthy bankers, students and hippie drop-outs coexist in a city that has some of the highest, most avant-garde skyscrapers of Europe next to well maintained old buildings. The downtown area, especially Römer square and the museums at the River Main, draw millions of tourists every year.