The Archives of the City of Brussels refers to both a service and a building that preserves the City's memories. The wealth and variety of its collections make it one of the most important historic centres in the country.

The main role of the Archives of the City of Brussels is to safeguard the documents produced by the municipal administration since the Middle Ages. The service also collects and stores a large number of documents (brochures, advertising flyers, etc.), however unimportant or modest they may be, so that future generations can have a full and faithful image of as many aspects of Brussels life as possible.