Excavations took place at the rectory of San Salvatore at Barzanò (Lecco) between 2007 and 2010, both inside and outside the structure. The crypt and sacristy were completely excavated, while the main body of the church and the bell-tower were partially excavated to an average depth of 0.50 m below the floor level. Despite this, it was possible to identify nine archaeological phases, which contribute to clarifying the structural development of the rectory datable from the early medieval to the modern period. Furthermore, several groups of tombs, including a late antique sarcophagus re-used in the late medieval period, were documented. Following a first phase, represented by an ancient terracing structure (not datable) identified within the present crypt, a small church with a sub-rectangular plan abutted by a bell tower was constructed. Subsequently, the building was extended to the west and at the same time, a terracing wall was built in front of the facade. Later, the first dome with frescoed ceiling was built and this was associated with the first baptismal font. A small crypt was then created by excavating the foundations down to natural. Lastly, a small room functioning as the sacristy was created above the crypt. The church walls were reinforced with a buttress in order to stabilize them on the valley side.