Remains of a Roman fortification can be seen alongside Via Mura Ciclopiche.

I’m still working to decipher the meaning of the name for the pathway.  (One answer I’ve seen invokes Greek myth; the other says it’s so-named because it follows the line of a fortified road that ran along the outside of the walls. Reason fails me.)

Elsewhere, another stretch of wall readily displays three phases of construction.

The irregular blocks are pre-Roman (4th century BC).  The squared limestone blocks are from the Roman colony (c. 241 BC).  And the unseen section, parts of the restored walls after Sulla (82 BC) and the earthquake (63 BC) remodeled.