The cemetery of Bologna is home to many artifacts of great historical and artistic value. This legacy poses significant problems in terms of conservation and restoration and targeted design requires the proper characterization of the state of the artifacts. In this paper we present the results of three geophysical methods (acoustics, Georadar and electrical resistivity tomography) for non-invasive characterization of a portion of the left wall of the corridor to the Cloister of 1500. The analysis showed the presence of structural heterogeneity and localized anomalies. The heterogeneity is represented by macro-structures, such as the closure of an old gate and small abnormalities, such as plaques and likely presence of hidden voids containing small objects. Finally, the results of acoustic and electric surveys confirmed the presence of loose/porous material behind some gravestones. These results are to underline the usefulness of using integrated geophysical techniques for the characterization of heterogeneity at different scales, leading to proper planning and limiting the number of invasive procedures.
Keywords: Georadar, ERT, Acoustic, Historical masonry.