During a stroll in the streets of the city will be evoked, on examples, the problems related to the conservation of a heritage, and the difficulties related to the investments necessary to maintain it in condition. Then, considering the new climatic challenges, will be illustrated the parades of traditional architecture, to finish on the perspectives and methods compatible, in Remarkable Heritage Site, with aesthetic and regulatory requirements. By Jean-Marc Bernard, in charge of the safeguarded sector RDV: place de la République, 13200 Arles Reservation required on 04 90 49 39 31