During this fourth campaign, excavation continued on both the south side of the forum (trench E) and the west side (trench F), where work continued to uncover the remains of a podium building, probably the capitolium.
In trench E, the excavation area was extended from 500 to 750 m2 and the number of identified rooms rose from 17 to 25, all belonging to one large domus of Augustan date. The building’s plan was defined further and the function of several rooms identified. Four construction phases were documented, the latest datable to the late 4th-early 5th century A.D.
Overall, the following rooms were documented (updated to October 2019):
atrium (room A, partially excavated);
right wing (room E, excavated);
pool (or semi-hypogean room; room D, excavated);
tablinium (room I, excavated);
corridor (room H, partially excavated);
triclinium (room C, excavated);
large reception room (room B, almost completely excavated);
peristyle with central circular pool (room P, partially excavated);
corridor (room Q, partially excavated);
shops and corridor (rooms L, O, T, Z, partially excavated);
second atrium (or reception room , room G, almost completely excavated);
cubicula (rooms F, AB, excavated);
rooms of uncertain identification (rooms . M, N, R, S, U, V, AA, AC, AD, to be excavated).
In trench F, work continued to uncover the remains of a rectangular building on a podium, probably the capitolium, which lay below c. 100 m3 of rubble. This has been removed and it was possible to confirm the existence of: – a main building divided into two rooms (_pronaos_ and cella). The cement floor on a stone base was almost completely missing as it was destroyed during the early medieval period when a limekiln was built nearby; – an elongated rectangular building abutting the south side of the podium (16.5 × 3.4 m). Its walls were built in opus caementicium and were over one metre wide. The interior presented two dividing walls. Also of substantial width, which delimited two small lateral rooms that were originally underground. At the centre there was a rectangular room (7.5 × 2 m), its interior wall facing in opus vittatum. At a certain point, the latter went out of use and was filled with soil. Three pits were cut into this fill at the time the limekiln was constructed; – part of a room paved in opus signinum belonging to another building on a completely different alignment to that of the capitolium .
It is possible to date the podium, the building abutting it and the structure with the opus signinum floor to the Republican period (2nd – first half of the 1st century B.C.), while the walls of the temple building seem to date to the Augustan period. The limekiln can be dated to between the 8th and 10th centuries.
Work in trench D was restricted to the maintenance of the structures that had already been excavated.