In the necropolis south-east of the ancient city were discovered pit tombs orientalized with rich furnishings, and aristocratic tumuli. A large public building of the 2nd century BC was discovered in the urban area near the walls, as well as an exceptional series of epigraphical documents, among them two honorary bases from the Severan age. The excavations in progress are allowing an improved understanding of the Lavinium of imperial age. The urban area, following upon the reduction of the site begun starting from the second half of the 3rd century BC, was affected by new and important building interventions under the Flavians. Between 313 and 324 Constantine and Licinius restored the baths. The end of the city came in the 5th century and is perhaps attributable to an earthquake.

The modern town of Practica di Mare, which has developed around a medieval tower, partly occupied the ancient acropolis. The loss of the ancient toponym is due to a gradual depopulation which determined the loss of _Lavinium_ in the late antique period. In the first phase (1957-1969) the investigations concentrated on the suburban area with the exploration of the Santuary of the XII Altars (mid 6th- beginning of the 3rd century B.C.), perhaps the _Aphrodision_ cited in the sources. The find of a bronze lamina bearing a dedication to the Dioscuri (6th century B.C.) offered new elements for the study of the introduction of the cult of the twins to _Latium_ and Rome itself. In 1968, near the sanctuary, an Orientalizing _tumulus_ tomb, monumentalised in the 4th century B.C., was discovered, identified by P. Somella with the _heroon_ of _Indiges_, assimilated with _Aeneas_. In 1977 investigations began again on the slopes of the hill east of the ancient city where a dump of votive material was discovered (end of the 7th-beginning of the 3rd century B.C.), relating to the cult of Minerva and comprising fragments of terracotta statues. In the 1980s the earliest evidence found consisted of “ a pozzetto” cremation burials dating to the Final Bronze Age (XI-X century B.C.), obliterated by occupation levels containing material of the 8th and 7th centuries B.C. Two large complexes date to the archaic period (6th century B.C.), built with a footing of blocks and other segments of cappellaccio and frameworked walls, destroyed by fire at the beginning of the 3rd century B.C. The most important element was constituted by the _forum_ with connected buildings. On the short western side were a building on a _podium_ and a large temple with three _cellae_ or _ad alae_, of late Republican date. This was monumentalised in the Augustan period with the addition of two foreparts at the side of the stairway, which had substituted an earlier cult building, to whose decorative scheme splendid architectural terracotta slabs belong. It is possible that this was the temple of Minerva to which the large dump of votive material belonged that was found outside the city walls in 1977. The long sides of the _forum_ were delimited by porticoes on to which rooms opened. That one of these was an _Augusteum_ is attested by the presence of marble portraits of the Julio-Claudian emperors. The structures, which date to the Flavian period, are evidence that the _forum_ was restructured at that time. A large bath complex, of Severan date, occupied the entire frontage of the hill towards the west. (MiBAC)

The archaeological mission of the University of Rome "La Sapienza" at _Lavinium_ has restarted in 2005 the excavations on the indigenous sanctuary of _Sol Indiges_. This latter was commemorated by the ancients as the place of Aenea's landing. Two trenches were opened: one on the left bank of the paleo-riverbed of the canal linking the lake to the sea (Area 1), the other on the right bank, at the centre of a large artificial terrace platform (Area 2). The first trench revealed the baths of a villa of Imperial date (2nd -4th century A.D.). The complex was laid out on several levels and appeared separated from the rest of the residence by an ambulatory with an opus spicatum pavement. The heated rooms had various pools with the remains of marble decoration and were fed by a small cistern added after the construction of the building. The second trench revealed the remains of a large temple building, preserved just in foundation, in which it was proposed to recognize a peripteral _sine posticio_ plan with a peprino wall built in opera quadrata. The low _podium_ was tetrastyle, areostilo, with a double line of columns on the front. To the large stairway giving access to the front correspond two small staircases at the back, whose presence can be explained by the temple’s off-centre position with respect to the platform that delimited the sanctuary area. This area can be reconstructed as having three sides, perhaps with porticoes, formed by sequences of rooms, with one open side on the edge of which stood the actual cult building. There was an open area behind the temple used for ritual functions; the two famous altars of “Trojan construction” mentioned by Dionysius of Halicarnassus may have been situated here. The structure uncovered can be dated to the mid Republican period (4th-3rd century B.C.) even though amongst the finds were fragments of acroteria, architectural slabs and antefixes datable to the end of the 6th century B.C., which confirm the presence of an earlier structure that was obliterated by the restructuring of the sanctuary. The decorative schemes documented by terracotta slabs of the Campanian type, show that restoration work was undertaken at least until the Augustan period. During the early Imperial period the area surrounding the building was restructured: the ground level was raised, probably due to frequent flooding from the coastal lake by which the sanctuary stood and a wall in _opus reticulatum_ was built all around the area.