GNGTS 2021 - Atti del 39° Convegno Nazionale

441 GNGTS 2021 S essione 3.2 GROUND PENETRATING RADAR SURVEY FOR THE CHARACTERIZATION OF SAN SEBASTIANO CHURCH SUBSURFACE (REGALBUTO, CENTRAL SICILY) G. Patti 1,2 , D. Boso 2 , F. Patti 3 1 GPgeo, Acireale, Catania, Italy 2 Geoexpert, Acireale, Catania, Italy 3 Apex Geophysics, Gorey, Co. Wexford, Ireland Introduction San Sebastiano church, located in the north-west portion of the Regalbuto urban area (Fig. 1), is home of the oratory and the confraternity of S. Sebastiano. It rises in the homonymous district in a wide square, alongside the houses built by the same confraternity. The 16 th century church represents one of the first examples of social architecture. It was set upwith transitory decorations in the following century, which over time they were removed by the same confraternity who sold the precious furnishings (Fig. 1b). The church consisting of a single rectangular nave, with a NW- SE longitudinal axis. In the SE area of the church is situated the presbytery with the main altar (Barilaro et al ., 2007; Imposa and Mele, 2011; Imposa and Grassi, 2015; Imposa et al, 2018; Grassi et al. , 2019). This study shows the results of a non-invasive investigation in which was used the GPR (Ground Penetrating Radar) electromagnetic method. The investigation is focused on the study of the church subsurface and on the identification of old structures and potential crypts. Fig. 1 - a) Location of Regalbuto municipality; b) photo of the San Sebastiano Church; c) geological map of the study area.