Excavations in the locality of Lo Scoglietto uncovered the remains of a temple whose construction can be dated to the 3rd century A.D. A late antique phase dating from the 5th century onwards was also identified.

The temple structure had a rectangular plan, 11.5 × 6.5 m and was constituted by a raised podium faced with opus testaceum. Opposite the entrance was a small flight of steps faced with marble coming off of a square paved with opus spicatum.

The great concentration of pottery finds coming from all over the Mediterranean basin provided a wide panorama of the trade and economic network in which the area of Roselle was involved from the mid imperial period onwards. Finds of a substantial number of coins attested on the one hand possible economic transactions, but on the other represented the most common form of offerings that may be associated with the presence of ceramic ex-votos in the form of lamps. Further evidence of trade was the use of precious marbles, coming from both the northern VII Regione- Luni – and from Africa, for the internal and external decoration of the sanctuary.

Following the systematic demolition of the temple, provisionally dated to the 4th century A.D., the Scoglietto area underwent changes in the urban plan when a circular pisé hut was built on the southern side of the sanctuary. Together with this evidence there were traces of a line of defences constituted by two walls in opus mixtum and a timber palisade. Furthermore, a stretch of the internal road system was uncovered, made up of clay mixed with crushed brick that was then pressed to create a road surface. Seemingly to be associated with this new phase was the reuse of a grotto, perhaps as a dwelling, at the foot of the Scoglietto hill during the 5th-6th century.

Future research programmed for 2010 will aim to complete the excavation of the mid to late imperial sanctuary, to check for the presence of other late antique structures and to search for phases pre-dating the temple.