“…From this representation, it is possible to see that although some superficial anomalies, highlighted with red dotted lines in Figure 9b, show downward continuity and can be interpreted with the presence of underground utilities, others alignments, signed with black dashed lines, show non-corresponding forms and trends. One of them, in particular, is in the direction of the church of San Paolo d'Alga (Figure 10) and could, therefore, be related to the first stretches of tunnels that have recently been identified below this church [9], and which could, therefore, develop in the same direction. These latter could be traces of the ancient, buried walkway that connected the ancient quarter with the plain where the cathedral stands today [3] or, more probably, with the ancient seafront door of the town [7].…”