In 2006 the investigation looked at the north-eastern corner of the excavation (Trench 1) and the south-western corner, that is the area to the south of and up against the apse of the western square room (Trench 2).

In Trench 1, after the removal of the volcanic deposits, what came to light was an area of floor in a square room (6). This was delimited to the south by the podium wall of lava blocks and brick blocking on which the colonnade stood. To the north the room was delimited by the western stretch of a structure in opus vittatum mixtum with pilasters. The use of opus signinum was probably linked to the cistern and tanks found in previous years. On the eastern edge of the area an opening was identified thanks to the impression left by the threshold of the large door of a sizable rectangular apsidal hall. Of this structure only the northern edge was found, constituted by a wall in opus incertum, on which stood two pilasters in opus vittatum mixtum (of the second only traces remained). The pilasters supported three round arches, of which only the eastern one remained, linked to the transverse wall in which the apse opened. The dome of the apse was decorated with a fresco showing sea monsters (tritons and seahorses) ridden by Nereids, immediately above the impost of the apse vault so as to form a sort of continuous frieze on a blue background and recreate a marine environment. The upper part of the dome was decorated with a shell motif. These frescoes were in phase with the walled structures and can be dated on a stylistic basis to the second half of the second century or the first half of the third century A.D., a period which also suits the architectural style of the apsidal hall itself.

The excavations in Trench 2 defined a stratigraphic sequence that went down to 3m below the ancient floor level: Period I was characterised by the formation of geological deposits of volcanic material containing no anthropological material, of uncertain date, perhaps post 79 A.D.; period II, the pottery from this period (ARS A, coarse wares and Italian sigillata) fix its date to around the 2nd century A.D.; period III, characterised by an abundance of material interpretable as waste from some manufacturing activity and ARS A pottery, can be dated to the 2nd century A.D., the terminus post quem for the construction of the stone paving; period IV, in a later period, datable to the 4th century A.D. on the basis of the pottery found in the apse foundation trench ( several fragments of ARS C, no earlier than the 3rd century), the stone paving next two room 2 was removed and an apse built; period V, saw the abandonment of the area, pottery such as ARS D, coarse wares and lamps date this period to the 5th century, that is immediately prior to the eruption of “Pollena”. (MiBAC)