The paper concerns with the use of unbaked bricks and clay in late medieval and early modern architectures in Umbria. In this central Italian region, a few structures are featured by such building materials, especially in areas lacking in good stone deposits. The topic has been sporadically investigated by previous studies and awaits systematic approaches. In particular, it is necessary to clarify the chronology of these building technologies and, regarding unbaked bricks, their relationship with the local baked production. Many different types of evidence will be considered: written sources, historical cartography, stratigraphic data, chrono-typological and mensio-chronological serialisations. Therefore, such focus fully locates the research within the borders of architectural archaeology. The expected goal is specifying the socio-economic, technical and chronological context in which clay-based techniques were developed and used. The paper also aims to enhance the attention and supervision on this type of material culture by related public institutions.