The archaeological research carried out in the last twenty years in conjunction with the renovation of the church and abbey of San Caprasio, in Aulla, has led to the reconstruction of important parts of Lunigiana's history. Starting from the distinction of the three main phases, one of which precedes the foundation deed of 884, which gave the complex its current architectural forms. But also investigating the subsequent low and post-medieval phases. A research characterized by two aspects. The first is, in all the excavation areas, the scarcity of the levels of use and, therefore, of the artifacts of common use. The second is given by the frequency of finds that we do not exaggerate in defining exceptional: the two pits in which the body of San Caprasio was laid and the complex architecture of the second burial which includes a stucco sarcophagus and an inscription left by the participants in the rite; a large tower in squared ashlars having characters otherwise not attested in Lunigiana, but also numerous bell pits, quality stone artefacts and in two cases attributable to Oberto Ferlendi, a magister known for other works in the Parma area, some fragments of stucco decorations that enrich what is known from Verzone's studies. With a chronological grid based on numerous radiocarbon dates that have led to rethinking what is already known from the sources, contributing to a better understanding of the events that took place along what will be the Via Francigena since the early Middle Ages.