 The scope of the work was to consolidate some areas of the intonaco at the eastern end of the building and partially remove the soot and dirt.The preliminary experimentation for the modern restoration began in 1979.The restoration team comprised Gianluigi Colalucci, Maurizio Rossi, Piergiorgio Bonetti, and others, who took as their guidelines the "Rules for restoration of works of art" as established in 1978 by Carlo Pietrangeli, director of the Vatican's Laboratory for the Restoration of Pictures, which govern the procedure and methods employed in restoration.