Beside the public archives, the National Archives also preserves numerous private archives such as the archives of politicians who entrusted their records to the institution. The richness of those archives is also due to the sometimes voluminous archives of the most influential Belgian families handed over to the National Archives:
The archives of the Houses of Arenberg, Merode, Ursel, etc.
Also worth mentioning:
The cultural archives: records of the administration of the Théâtre de la Monnaie, etc.
The maps, plans, prints, manuscripts.
Over two million individual files on foreigners, created as from 1839 when the Sûreté publique was charged with the control of all foreigners on Belgian territory.
The collection of seal moulds.
The digital documents accessible via the digital reading room.
Various publications mainly about the history of Belgium and in particular the history of Brabant, but also series of print sources: pamphlets, edicts and old ordinances, specialist journals and books on archival sciences, inventories of the archives preserved in other repositories in Belgium and abroad.
The National Archives is equipped with a reading room for the public. Researchers, historians, students, people interested in local and family history, etc. can consult the available documents while respecting the privacy of certain information. A number of exhibitions aimed at valorising the collections are organised in the entry hall and accessible to the public for free. Colloquia and study days are held on a regular basis for a learned public. The National Archives also houses the national coordination services of the institution.
Some church registers from all over Belgium and an increasing number of civil status registers not older than 100 years can be viewed as digital images in the 19 reading rooms of the State Archives, including the reading room of the National Archives. Furthermore, researchers and victims of Nazi persecution or their relatives can consult, upon request and under certain conditions, the digital copy of the archives of the International Tracing Service at the National Archives. This digital copy pertains to the civil victims of the Nazi regime and contains documents about labour, concentration and extermination camps, registration files about displaced persons, lists about forced labour and a central name index, the originals of which are preserved in Bad Arolsen, Germany. Since January 2013, the parish registers and civil status registers are also accessible for free via the website of the State Archives. Other types of digital documents available in the digital reading room or on the website of the State Archives are, for instance: the proceedings of the Councils of Ministers, the statistical yearbook of Belgium since 1870, over 20,000 seal molds, etc. The reading rooms in the different repositories are accessible to every holder of a valid reader’s card.
