This study is conducted in the framework of the PRIN 2022 PNRR "Safe Motion" project, funded by the European Union's NextGenerationEU which focuses on the structural assessment and development of innovative safeguard measures for historical masonry towers.

We present here the safety assessment and seismic reinforcement measures for a representative masonry bell tower close to Gorizia in Friuli - Venezia Giulia. The sample tower has walls composed of two loosely connected layers, the outer being stronger than the inner one. Key activities conducted have included site inspections encompassing visual and experimental investigations, a detailed analysis of the tower's structure and historical information. Dynamic testing has been employed to assess the tower's dynamic response and to calibrate numerical models. The obtained finite element model has been used to simulate the tower's structural response under various conditions. Structural improvement interventions have then been implemented, including reinforcement techniques such as cross-layer metallic ties, to enhance the tower's stability and resistance to seismic forces. The project has also addressed the degradation of the tower's external masonry and proposed a solution to mitigate the effects of vibrations caused by the bell's operation. The ultimate goal has been to ensure the tower's safety and functionality while preserving its historical significance.