The seismic upgrading was carried out on all the buildings of the comprehensive institute in the municipality of Castiglione del Lago, with the exception of the primary school. The complex, consisting of several buildings, has a total floor plan of about 3200 m². The upgrade work of the structures adopted was differentiated due to the constructive characteristics of the existing buildings. In particular, for the buildings of the middle school, developing over 3 floors above ground, an insulation system was provided at the base, while for the kindergarten and the gym, specific reinforcement interventions were planned with the use of FRP (Fibre Reinforced Polymer).