Adjacent to the Sacello degli Augustali, the theatre is partly covered by modern buildings, but some features of the ambulatory and access to the steps are still recognizable, which on the top lean against the ridge of Punta Sarparella.
It is currently entered from the lower ambulatory with a covered hemicycle with a barrel vault, excavated in tuff and lined with opus vittatum; buried about half its height due to the effect of bradyseism, it has the entrance to the radial corridors with brick arch, which led to another semicircular gallery more internal. At the thirteenth corridor there is a rectilinear gallery, also half of its height buried. Finally, in the privately owned area there is a short stretch of the upper ambulatory and, at a higher altitude, the remains of a brick arch and a staircase, probably leading to the summa cavea.
