The abbey church of San Martino al Cimino has a Latin cross plan, measuring approximately 62 metres in length, 39 metres in width, and 21 metres in height from the floor to the ridge of the roof.

Within the scope of “Seismic risk assessment, vulnerability reduction, and restoration” activities, DIAMONDS was commissioned to carry out the following tasks:

• Stratigraphic survey of the floor inside the church and the surrounding external areas, as well as the masonry fabric of the perimeter walls, piers, and vaults of the central nave and transept, using two ground-penetrating radar units (one low-frequency and one high-frequency);
• Mechanical characterisation of the masonry, mortars, and concrete.
• Assessment of the stress state in the metal tie-rods of the vaults, through the use of accelerometers and the analysis of accelerometric signals in the frequency domain using classical spectral techniques, to identify the natural frequencies and modal displacements associated with the first transverse vibration modes.