The seismic vulnerability of existing masonry bell towers is absolutely a crucial topic, considering the significant damages and collapses occurred in these structures even in low/moderate seismic events. Nevertheless, there is still a lack of scientific research, especially experimental, concerning the dynamic response of these structural typologies. In order to improve the seismic behavior of masonry bell towers by reducing their vulnerability, the company ISAAC proposes an innovative “hybrid” approach, which involves the installation of specific devices for the active control of structures, more precisely Active Mass Dampers (AMD), combined with “traditional” strengthening techniques, FRCM in this case. The main purpose is to reduce the seismic demand on the tower through the AMD device and, at the same time, to increase the masonry capacity with local interventions only in some strategic points of the structure, thus avoiding the impact of overall retrofit, often incompatible with the conservation of the architectural/monumental heritage. In order to assess the seismic performance of the proposed approach, an extensive experimental campaign of dynamic shaking-table tests on a full-scale (12 meters high) brick-masonry bell tower, representative of common historical Italian solutions, has been carried out. Firstly, tests on the bell tower with only the AMD device installed have been executed; after this phase, the belfry has been retrofitted with FRCM and a second batch of tests has been performed. The analysis of the results of these shaking-table tests on the tower with the AMD turned on and off, both with and without the addition of “traditional” FRCM local retrofit, allowed to evaluate the advantages of the proposed approach in terms of seismic response compared to the existing bell tower without interventions.