There is a great need for a database recording the existing information and where and how they can be consulted. The respect of the monument in all its historical and artistic values defines the limits of any restoration work to be done. The function of the monument by the time of the restoration has to be taken into account. As a rule restoration should be limited to the necessary minimum. 2-In the reconstruction process of a monument or part of a monument from scattered elements, it has been frequently required to add new parts such as blocs of stone or masonry.
Any reconstruction has to be based on sound historical architectural and technical studies.
The choice between brick masonry and newly carved stones to replace missing parts depends on the cases. No general rule can be established. Architectural details can be suggested by their general outlines or volumes. We could similarly fill in the gaps with stone material to insert floating fragments or improve the stability of the structure. The filling of gaps is sought to protect from the destructive environmental forces .of the surrounding environment and is necessary to insert floating elements.