IL CHIOSTRO OTTAGONALE DI SAN MICHELE IN BOSCO A BOLOGNA. FINITURE PITTORICHE DI DIFFICILE CONSERVAZIONE

Between 1604 and 1605 some artists of the Accademia Clementina painted the walls of the octagonal cloister of San Michele in Bosco in Bologna. Ludovico Carracci and Guido Reni painted the principal scenes of the stories of San Benedetto. On this occasion, the painters and their students applied the technique of painting with oil-mixed pigments on dry plaster. Today, the serious state of conservation of these paintings becomes an opportunity to think about the proper preservation of both the architecture and pictorial lavers that are designed in close relationship with the built space. In these cases, operative choices must necessarily take into account the different conservation needs of architecture and paintings ,as well as the risk to cause a further damage, to them. The contribution deals with the themes of the, techniques used to make the paintings and of the relationship between their deterioration and the architectural layout of the site. Laboratory studies, were carried out on micro-fragments ,of the paintings to know the binding media ,the pigments,and the materials used for the “imprimitura”.