The urban center around Frankfurt is known as Rhine Main Area since the end of 19. century. The metropolitan area is about 14.800 square kilometre and extends over the province Rheinland-Pfalz, Hessen and till to Bayern. The area has about 5,5 millions inhabitants.
The central location and the good transport connections are attractive for many companies especially for the car industry and the business of banks. The Frankfurter motorway junction and the central station are the busiest in Europe and the Frankfurter airport is the one with the biggest volume of cargo in Europe.