Since its creation in 2001, 40mcube works on its archives. In 2010, all the originals were stored at the Archives de la critique d’art in a specific record. At the same time, facsimiles were made in partnership with the Archives départementales d’Ille-et-Vilaine.

More than 70 volumes gathering more than 20 000 documents can be read at 40mcube, at the archives départementales d’Ille-et-Vilaine, but also online (here) or with the app Inventaire.