Excavations begun at the Cluniac priory of Castelletto Cervo in 2009 continued in the area investigated in that year (area 500: courtyard south of present parish church, previously a prioral church, datable to the end of the 11th century). Two new trenches were opened in the area north-east of the church. Trench A was placed in correspondence with the eastern end of the north nave – a rectilinear wall resulting from late medieval alterations which obliterated the end of the ancient presbytery. Trench B was placed up against the eastern end of a building standing to the south-east of the church itself, now used as a warehouse, but probably originated as the monastery’s second church.

Continuation of the excavations in area 500 exposed the majority of the structures identified in 2009, and clarified, at least on the level of a working hypothesis, the organisation of the area and its development during the medieval and modern periods. In particular, the presence of two parallel main walls was documented, lying at a right-angle to the church and on a north-south alignment. They appeared to belong to the same construction phase and were perhaps part of the east wing of the Romanesque cloister. Immediately to the east, a number of burials were identified within a walled space that may have been a gallery forming part of the cloister. The burials were in tombs made with cobbles and brick, with a pitched covering and dated to at least two periods in the development of the funerary area, which was in a privileged position.

Following the Romanesque period, to which the structures described above can be attributed, the excavation documented traces of building interventions involving the cloister-arm, which, among the other alterations, was divided into two rooms by a cobble and brick wall. The wall was associated with a floor and brick facings, structures already uncovered in the previous campaign. In correspondence with the building’s western entrance, two substantial parallel walls were built to the west. These were characterised by the same construction technique (cobbles with squared and levelled stones at the top) and were built to protect/monumentalise the entrance itself.

The final phases, preceding the radical transformations occurring between the 18th and 19th century for the creation of the cobbled surface identified in 2009, were represented by the construction of two small rooms with cobblestone walls bonded with clay and by signs of substantial robbing.

In the area behind the church Trench A revealed as shallow portion of the northern apse, datable to the first phase of the monastic complex (end of the 11th century), built of cobbles and mortar. At the same time a wall on a diagonal with respect to the other alignments within the layout of the Romanesque monastery was noted. This may have belonged to a pre-existing structure.

The foundations of a deep apse, built of cobbles and mortar, came to light in the sector abutting the building to the south-east of the present parish church. This confirmed the hypothesis identifying the structure as the second prioral church. Almost on the same median line as the apse, to the east of the latter, there was a wall associated with a second perpendicular wall, of which a section was preserved, which could belong to an attached room, if not dating to a period preceding the construction of the church. A burial in an earth grave was identified in the area, but not excavated.