Salvador de Bahia is an eminent example of Renaissance urban town planning adapted to a colonial site by having an upper city of a defensive, administrative and residential nature which overlooks the lower city where commercial activities revolve around the port. The density of monuments makes it, along with Ouro Preto, the colonial city par excellence in the Brazilian Northeast. It is one of the major points of convergence of European, African and American Indian cultures in the 16th-18th centuries.