In the first phase, a historical-critical analysis identified the existing structural system and its state of stress, then we proceeded with the geometric-structural survey to develop an accurate model of calculation of the structure. Through mechanical characterization of the materials with specific on-site investigations that took place using mountaineering techniques and laboratory tests in order to achieve the most accurate level of knowledge possible, it was arrived at the definition of the actions and related structural analysis with the determination of the vulnerability of the existing structure system.