Dozza's fortress houses Study and Documentation Center of the Painted Wall in its rooms. The collection houses the original sketches of all the frescoes decorating the village's walls. The first sketches date back to 1960, when the Biennial Exhibition of the Painted Wall was held for the first time.

Moreover, the art gallery features some paintings removed from the walls to prevent them from deteriorating. Worth special mention the sketches by renowned painters such as Matta, Mascellani, Saetti, Sassu, Keizo, Pozzati, Tournquist and Licata, etc.