The 6th excavation campaign on the site of Santa Cristina in Caio saw the extension of the two excavation areas opened in 2013 (areas 4 and 5). The enlargement of area 4 revealed an early medieval silo with a stone covering, a sunken-floored circular hut, reused in the late medieval period as an ossuary, where several 12th century Senese coins were found. Three burials were also identified, one of which on a different alignment to all the others. Towards the southern edge of the trench, the make up for an apsidal wall was exposed, at present of unknown function and date. It may have been an imperial structure or the church of S. Cristina in Caio mentioned in the sources.

In area 5, excavation of the necropolis and kiln dump, which was much larger than it was originally thought to be, continued. A tank was found, probably for settling clay, which was then reused as a burial place and later as a sunken hut in the 7th century.

The area of Poggio alle Fonti, where the excavations are taking place, lost its productive (industrial) function at the end of the 1st century A.D., but some activities may have continued until the 3rd century. It is suggested that the various burial phases post-date the 4th century A.D., coinciding with the transformations within the site that had previously been documented in the area of the baths. The area subsequently became residential with the installation of sunken-floored huts, or grubenhauser.