The Museum's warehouses store those pieces from the Permanent Collection that are not in the Museum's Permanent Exhibition Rooms, that is around 80%of the total collection.
The pieces stored, which can be studied by researchers who present a formal request to the Museum management (Dirección del Centro), occupy two independent areas within the Museum's service area. The large pieces mainly marbles and mosaics are on the mezzanine floor with independent access from the exterior. The smaller pieces, arranged on shelves and trays, are near to the restoring and documentation services. They are organised typologically and in some exceptional cases according to the sites at which they were found.