La chiesa di San Colombano a Bobbio (PC). Dati di scavo e considerazioni architettoniche per una prima ricostruzione dell'abbaziale in età medievale

The article presents the results of research conducted on the Abbey of San Colombano at Bobbio, including a trial excavation preceded by a geo-physical survey and a preliminary analysis of existing walls for the purpose of identifying elements that would be useful for the reconstruction of the medieval phases of the Church. The excavation revealed, among other structures (mostly of a funeral nature), a facade with an entrance connected to an internal stairway which led to a nave with a 12^th century mosaic floor, a large portion of which was preserved. The paper dwells on the relationship between this evidence and the eastern nucleus of the Church where we found sections that could be dated to the early 11^th century (bell-tower and part of the northern wall).