The Architectural Conservation Section deals with the conservation of the built heritage and also includes the care of limestone artefacts such as statues and fountains both on- and off-site.

The conservation studio is divided into two areas. The main area is reserved for in-house and off-site conservation treatment and training practice. These include the preparation of lime mortars, using both slaked lime and hydraulic lime, as well as the carrying out of treatments such as cleaning, consolidation and repair of stone artefacts temporarily removed from site. The other area is reserved for stone dressing, sculpture and as a temporary storage for large pieces such as statues.

This section also carries out multidisciplinary projects in conjunction with other conservation sections, including the Paintings & Polychrome Sculpture Conservation Section, the Objects Conservation Section and the Documentation Section. It also participates, with the aid of European funding, in Leonardo da Vinci projects.