The large number of data collected during various historical researches, diagnosis surveys and the restoration were all processed and filed in an innovative computerized system. This system was used during the different stages of the restoration and it is today available at the offices of the Soprintendenza per i Beni Architettonici, Artistici e Storici of Arezzo. The system can be accessed only under official authorization. Data can be processed through a cartographic system based on photogrammetric surveys of the painted walls. The relational database is structured in a series of indexes. Files are divided into didactic, diagnostic, and intervention sections. With a click on the flashing spot it is possible to access the database and go straight to the archives containing all information on different historic events