The work was based on a historical analysis of the conservative state, the proposal of interventions aimed at controlling degradation phenomena, solutions for some consolidations and a reuse project of the church of San Lazzaro dei Mendicanti in Venice. In all its phases the thesis was accompanied by a specific HBIM process applicable to historic buildings which allowed the creation of a digital model of the church that can also be used in the future thanks to the information implemented in it.