Archaeological investigations continued inside Palazzo Donnaregina. A new trench was excavated prior to the installation of a goods lift serving the new Museum of Contemporary Art. Important data was gathered regarding the geomorphological reconstruction of the north side of the hill, where the ancient town stood, and for its layout. Part of the natural stratigraphy of eruptive formation dating to the prehistoric period was uncovered. Part of the terracing system and the fortifications along the north side of the hill were also revealed.

The foundations of the double curtain wall of this stretch of the defences were identified, with the émplekton layer behind filling the space between the hillside and the buttress. The foundations of a tie course toothed into the buttress also came to light together with a single block of yellow tufa from the wall of orthostats. The presence in at least three places of the quarry mark ΔΗ on blocks in the curtain wall foundations and those of the tie course, together with the few materials found in the preserved patches of émplekta, suggest a date of the 3rd century B.C. for the fortifications-terracing.
This find, on the one hand confirms what partially emerged from the excavations in the 1960s, that is the presence on the slope of more than one alignment of walls at different heights. On the other hand it proved definitively that the town’s curtain wall was built up against the scarp at mid height and did not run along the hill summit.