Originally Posted by
YVR Cockroach
Frankfurt am Main is the major financial and business centre of Germany with just about all the German banks, as well as the European Central Bank (successor in essence to the Deutsche Bundesbank), and the surrounding region also contains most of Germany's industrial base. Not sure if this was the case pre-WWII or not. As mentioned by others, Munich is also important and so is Dusseldorf in the north but nothing beats Frankfurt. Financially it is very similar to why London is a hub for the U.K.
Everything is true but the induestrial base in Frankfurt. The industrial heart of the country is certainly within the triangle formed by the airports of Cologne, Dusseldorf and Dortmund with a population of close to 20 Mio people. The financial heart is Frankfurt, the heart of Siemens, BMW and entertainment industry is Munich. However, Berlin is nothing but government and this does not require an aweful lot of direct international flights.
And Frankfurt is certainly located very centrally with direct raillinks to most of the country. an airport that is very accessible on the crossway of national autobahns and railway tracks and with 24/7 airtraffic.