There is no profound difference between restoration and design because each restoration is a design, although of a special kind. In this case the design is not an independent operation because the ‘system of rules’ intrinsic to the building in question must be identified. Reference to generally acclaimed instances in restoration of the modern allow an architect to relate more closely to this system through an analysis of the formation of the original design, by means of an investigation which clearly assumes the traits of objectivity and communicability. In this manner, the designs establish a close dialogue with every single building, in the sense that each time they interpret the principles of the building in order to address the questions of degeneration, change of use and possible replacement or reconstruction of missing parts which may be in contrast with the original building.
Keywords: Science of design; system of rules; Gibellina