The city DÃ¼sseldorf (Germany) is simply host of a "Landgericht" which is something like the District Court. There is the "Oberlandesgericht" which stands above several "Landgerichte" within the whole country. It is the direct link between these and the Federal Court of Justice (which is somewhat like the Surpreme Court). So basically there are several public authorities.
Whilst there are already several "Landgerichte" there is only one DÃ¼sseldorf.
Within Germany the city is known for its ongoing disputes about odds and ends with Cologne. For example DÃ¼sseldorf is known for Beer called "Alt" whilst in Cologne the brew "KÃ¶lsch". Funnywise the "Alt"-beer can be brewed throughout the country whilst you may only call a beer "KÃ¶lsch" if it is brewed within a certrain range of the Cologne Cathedral.