In 1997 Patricia Van Schuylenbergh created an inventory of all the private archival collections at teh RMAC. These date from 1858 to the present day. She gives a brief description of each collection. The Inventaire des archives historique privées du Musée royal de l'Afrique centrale is available as a PDF (152 pages). The inventory contains a detailed index starting on page number 123 (page 126 of the PDF).
The RMAC also has preserved the archives of companies and institutes formerly operating in the Belgian Congo as well as a natural sciences collection, which includes a rock library.
The British Library's Endangered Archives program has supported the preservation and digitization of several archival collections from Francophone Africa. These are collaborative projects between the British Library, archives in Africa, and scholars. Many of these are highly specialized. Check the site for new projects.
This collection includes various colonial judicial records from 1912-1920, the Muslim Affairs Office records 1929-1957, and reports on the territory 1936-1954.
This collection is primarily focused on the last years of colonial rule and the early post-independence period. This collection preserves and digitizes the photographs of Mamadou Cissé and Abdourahmane Sakaly from the late 1950s and early 1970s.