Il rilievo digitale di una fabbrica del Quattrocento:la SagrestiaVecchia di San Lorenzo/Digital Survey of a Building Site of the Fifteenth Century:the SagrestiaVecchia in San Lorenzo.

The paper describes the digital architectural survey and documentation project of the Sagrestia Vecchia of the San Lorenzo complex in Florence, designed by Filippo Brunelleschi. First of all, the historical and cultural conditions that led to the urban design of a new complex for San Lorenzo are briefly described: the Sacristy was the first building built, following the new trend of styles and proportions that drew on ancient architecture. Subsequently the digital survey methodologies are described that were necessary to set up a documentation project that investigates and deepens the historical and construction events of the factory.The particular pandemic conditions prevented com- pleting the photographic acquisitions of the surfaces until after summer 2020; this is the reason why the drawings and the detailed architectural surveys were carried out following the morpho-metric indications provided only by the data coming from the laser scanner. This particular condition provided the opportunity to investigate the descriptive criticalities of point clouds, especially when dealing with architectures with complex architectural elements. Finally, the intentions and direction of future research are shown, which, star ting from the findings acquired, will investigate the issues of the construction and stratification of the complex with the aim of dissemi- nating information through digital interactive fruition systems.