The holdings of the Historical Archives of the European Union are organised in four different groups: EU institutions, bodies and agencies; Individuals; Corporate Bodies; Collections.

Users receive support to conduct their research at the Archives through a range of grant programmes and benefit from a large collection of research guides and specialised library resources.

Specialised staff deliver services to users who wish to consult the archives in a dedicated reading room at Villa Salviati or remotely upon request.

The Alcide De Gasperi Research Centre on the History of European Integration supports young researchers, coordinates networks of historians, facilitates the use of primary sources and increases public interest in European integration history.