Work was undertaken on the acropolis in the historic centre, where two important and adjacent rescue excavations were carried out. The first, in the bishop’s palace, revealed a complex and interesting stratigraphy dating to a period between the second half of the 2nd century B.C. and the modern period. Of particular interest were two imposing curtain walls of Republican date, respectively the end of the 2nd century B.C. and the first half of the next century, belonging to the substructures of the acropolis of Teanum Sidicinum. A fragment of a marble slab bearing a dedicatory inscription to Cornelia Salonia Augusta, wife of the Emperor Gallienus, was found in the earth fill obliterating the ancient structures.

The stratigraphic sequence revealed by a number of trenches dug in the courtyard of Teano hospital, on the acropolis of the Roman town, was even better defined. Prior to the construction of the Baroque convent, the area was occupied by the courtyard of an aristocratic residence dating to the mid 1400s. The area had previously been occupied by a cemetery with inhumations in earth graves and tufa coffins, datable to between the 10th-13th century. However, in antiquity the area was inhabited: a wall in opus vittatum may be dated to the 2nd century A.D., whilst pits dug directly into the bedrock and opus incertum walls, on the basis of the stratigraphy, can be dated to the end of the 2nd century B.C. One wall of the acropolis terracing, in opus incertum, was preserved and also constituted the northern limit of a room whose function could not be determined. This room overlay layers of fill dating to the 3rd-2nd century B.C. which contained numerous terracotta fragments, probably relating to votives.