Almost the only close parallel is that of Roman Carthage (fig.

24).

As Naples was by origin and character a Greek city, these narrow oblongs have been supposed to represent a Greek arrangement.

They do not, however, correspond to anything that is known in the Greek lands, either of the Macedonian or of any earlier period.

The conclusion is difficult to avoid that this Greek city of Naples adopted an Italian street-scheme, but laid it out with more scientific regularity than the early Italians themselves.
When this occurred and why, is wholly unknown.