This International Conference was intended to bring together engineers and architects involved in research and application of the structural conservation of historic stone masonry buildings. The aim of the conference was a scientific analysis of the various aspects of this subject: diagnosis and assessment, structural modelling of damaged, repaired and strengthened stone masonry buildings, problems related to execution and durability, and the relevant codes and recommendations. It was felt that these aspects had not always been given due attention at the numerous and otherwise fruitful cultural-scientific events related to the conservation of monuments and historic buildings. Therefore, this conference focused on the structural capacity of masonry rather than any other property, unless the latter had a clear impact on it. It is hoper that the scientific-technical topics of this conference will contribute to a sound basis for the assessment and rehabilitation of historic and traditional masonry buildings. Thanks to a more rational analytical modelling and a more systematic presentation of the problems encountered, the structural intervention may now be seen more as a technical scientific endeavour rather than as an empirical exercise. Thus, a larger number of engineers will be better qualified to design, as well as to carry out the implementation of such interventions in a safer and more economical way. It is believed that this conference was another opportunity towards such a goal.