The 2012 campaign excavated inside the church of S. Marco (sector V) and the external area adjacent to its southern perimeter (Sector I), continuing the work undertaken in 2003, 2004, 2007, 2009, 2010, 2011. The continuity of the stratigraphy between the two areas was documented and occupation of the site in the late antique and early medieval periods was confirmed.

In sector I, three circular cuts of differing diameters (36, 28 and 24 cm) containing layers with a humus matrix were exposed. Aligned north to south, they can be interpreted as post holes for three timber posts supporting a roof or a walkway abutting the curtain wall (USM 14) of a 6th-7th century enclosure. The removal of a layer of tile and plaster revealed a trapezoidal stone that formed the cover for a burial underneath the southern perimeter wall of the church and continuing beyond it. A large cut was interpreted as a foundation trench for the Roman temple found during previous campaigns.

Twelve burials in earth graves on a south-west/north-east alignment and datable to the early medieval period were identified in sector V. The removal of the layer in which the graves were cut exposed a compact level comprising layers of earth mixed with abundant large mortar lumps, make ups of small stones and stone chippings, interpreted as a levelling intervention on unstable or rough terrain, undertaken no later than the 7th century. On top of this stood the wall that was reused as the foundation for the façade of the present church. A circular hole in the centre of the excavation area can be related to this phase. Its sides were faced with a layer of mortar mixed with gravel and brick/tile fragments, and it would have house a post of about 70 cm in diameter. The removal of the levelling exposed the burial with stone covering described above.

The analysis of the stratigraphic sequence and finds dated these layers to the Byzantine period, characterized by the construction of an imposing wall without foundations, built on top of the levelling, in phase with the post holes and the reuse of classical architectural elements (column drums, architectural fragments). A tank made of Roman Corinthian -_tegulae_, bedded in an opus signinum make up dates to an earlier period. In phase with the tank was a semicircular cut situated in the southern part of the sector, which continued beyond the excavation’s western edge, interpreted as the temple foundation described above.