La Real Cittadella di Messina. Approccio architettonico alle preesistenze e restauro

[EN] Researches have offered many new contributions, both documentaries (about Carlos de Grunenbergh's formation and his architectural formulations related to the cultural reference models, and about the long phase of construction of the Royal Citadel, including the used materials and techniques) and, above all, about the physical consistency of the surviving structures, taking into consideration the detected stratifications as well. The results of these studies have been object of several educational experiences of experimentation design, since the knowledge and the historical-critical understanding of such a subject can highlight the guidelines and the appropriated instructions to approach and develop the restoration, interpretating the conservative instances coming from the work itself. The very interesting, topical subject about the quality of a project, seen from the perspective of an architectural approach to the pre-existences, is based on its comprehension itself and requires a deep relationship between conservation and innovation.