As centre of the economy and government, the majority of the nobles who owned no lands had settled down here. Famous companies always erected their headquarters in Stadtburg.
The act of placing their headquarters here served as status symbol for the merchants as well.
Furthermore, the area in a 200 km radius from Stadtburg was dotted with many towns exceeding a population of 10’000 inhabitants. You could truly say that it was a capital forming an economic bloc.