The building “stone materials” of the Genoese fortification system from the XIIIth to the XXth century

The article investigates the Genoese fortifications system from the point of view of the “stone materials” used in their construction and their response to the action of weathering. The system of walls and fortifications covers a rather wide time span ranging from the XIIIth to the XXth century. This study gives the opportunity to draw a rather complete picture on the evolution of processing techniques, preparation of materials and their placing (lime mortars with different additives and aggregates, different kind of bricks, stone blocks processed in a different way). It will be also possible to get information on the response of these materials to the action of the decay agents.