The subject of the present thesis is the evaluation of the dynamic and seismic behaviour of the Rialto Bridge, located in Venice; this structure crosses the Grand Canal and is one of the major attractions of the city, a UNESCO World Heritage Site. The Code of Cultural Heritage and Landscape has fixed the guide concepts for the activities of knowledge and preservation of the structures of historical and artistical importance. To this purpose in Italy a permanent monitoring network has been established since 1995: it is managed by the Seismic Observatory of Structures (OSS) with the objective to evaluate the Structural Health Monitoring (SHM), which consists in the identification of sudden or progressive damage, but also the monitoring of the building's performance in operating conditions or during exceptional events, for example in the case of earthquakes.