The thesis analyzes the evolution of the meaning of the term “authenticity”, paying particular attention to the earthen architecture and the technologies as well as the methodologies to safeguard this heritage. The research proposes as first general objective, a critical framework of the theoretical measurements supported by the UNESCO-World Heritage Centre actions, in order to safeguard all the World Heritage site and especially the earthen ones. Other objectives concern the draft of a complex framework, regarding the technical maintenance as well as the conservation treatments carried out in the earthen architecture. These objectives are proposed, also taking inspiration from the experiences held abroad by the PhD candidate and presented in the case studies
