for the : ItalianMibact Guidelines and European FprEN16883 Guidelines. The final goal will be to define a new replicable integrated procedure for energy improvement, starting from some considerations on Mediterranean climate. 
The research project is divided into four main steps: knowledge, analysis, evaluation and strategies. The first step ,knowledge phase, will correspond to the state of the art elaboration(identification of standards and assessment tools criticalities mostly in Mediterranean climate, literature on heritage retrofit, etc.), useful to develop the research proposal. After the dataset characterization, an assessment of two Guidelines will be elaborate to go deeply on retrofitting of historic buildings: critical features of Italian and European procedures will be identified through an analysis phaseon selected real case studies. To assess the feasibility of replicating the expected positive results, a mix choice of public and private buildings to improve in Mediterranean Area. The evaluation phase will focus on dataset, highlighting criticalities of some different methodologies for energy performance evaluation (in situ collection of data, experimental analysis, static and dynamic models, diagnosis typologies, etc), applied on case studies. This third step in the project will be useful to underline challenges and gaps of the two Guidelines retrofit trends. Finally, during the Strategies phase will be reviewed the two Guidelines approaches, introducing additional targets for obtaining a calibrated evaluation method for a retrofit project: these form the basis of a set of best practices for retrofit and in-situ treatment.
The research will also implement research in Mediterranean area, defining best practices not only as specific cases for the Mediterranean area: the best practices are intended to support program administrators and the general retrofit field in efforts to enhance energy efficiency of the existing historical buildings at the time of major renovation. 
Keywords
Historic building; Energy efficiency; Mibact Guidelines, FprEN16883 Guidelines, Mediterranean climate, whole building procedure, tailored intervention.