A geophysical study of the Scarsella vault, the high altar of St. John's Baptistery in Florence, was conducted to determine the internal structural features and thus ensure its proper restoration. The Scarsella's crossvault is covered with precious mosaics dating back to the Middle Ages. The vault is 10 m long and 5 m wide, varying in thickness 5–2.5 m.

To determine the extent of some fractures known to exist on the internal surface and to define the structural features of the vault itself, three different geophysical techniques were applied: electrical resistivity tomography (ERT), seismic transmission tomography, and ground-penetrating radar (GPR)....

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