An application of geophysical techniques to the study of man-made cavities of historical importance

(1) Apogeo s.c. a r.l., Altamura, Italy (apogeo.altamura@libero.it), (2) Centro Altamurano Ricerche Speleologiche, CARS, Altamura, Italy (cars.altamura@libero.it), (3) Institute of Research for Hydrogeological Protection, National Research Council, Bari, Italy (m.parise@ba.irpi.cnr.it, +39 080 592 9587), (4) Department of Cultural Heritage, University of Salento, Laboratory of Ancient Topography, LabTAF, Lecce, Italy (m_sammarco@yahoo.com)