Attidium was already a fully-fledged Roman town by 90 B.C., just before the Social War, when the settlement became a municipium and its inhabitants were ascribed to the Lemonia tribe. The town reached the height of its development in the imperial period, which was followed by a slow and inexorable decline.
Two excavation campaigns undertaken by the Archaeological Superindendency of the Marche in 1989 and 1993 in the present hamlet of Attiggio, locality of Campi San Giovanni, revealed remains belonging to a large bath complex. The structure, datable to the 2nd century A.D., was made up of six rooms. In addition to a calidarium and frigidarium, a rectangular room paved with a black and white mosaic depicting marine animals and fantastical creatures within a series of concentric frames was uncovered.

The excavation provided important information relating to the settlement’s topography that was previously unknown or only partially known. This season’s excavations continued the exploration of the same area, in the section immediately adjacent to the previously identified structures.

The removal of the surface layers revealed a number of rooms, the most interesting being B and C.
Room B, quadrangular in plan, was excavated down to its floor paved with a polychrome mosaic. A border of red/rose coloured tesserae surrounds a motif that recalls Greek-style opus quadratum represented by adjacent alternating squares and rectangles formed by two rows of red/rose tesserae, on a white background. A brick-built bench was situated in the north-western part of the room abutting the inner face of the wall. It is difficult to suggest the exact function of this room; however, it can be considered part of the baths, perhaps a changing room.

Room C, square in plan with an apse on one side was excavated down to it floor, paved in a monochrome white mosaic, several patches of which were missing. It is difficult to suggest its exact function at this stage; however it could be one of the pools present in the bath complex. The space was entered via two, badly damaged, masonry-built steps situated in its south-eastern part. It must have been completely lined with marble revetment, anchored to the internal face of the wall by metal cramps housed in small holes in the walls.

The preliminary pottery study documented occupation on the site in the period attested by the written sources, that is between the 1st and 3rd century A.D.