Actual remains found at Norba suggest rather that it was founded (not necessarily by Rome) about, or a little before, 300 B.C.; it is therefore later than the Terremare and Marzabotto, and later also than the Oscan age of Pompeii.

On the other hand, it came to an end in the Sullan period (82 B.C.).

Its excavation has little more than begun, but it already indicates a scheme of streets somewhat resembling that of Pompeii,[51] and it is a useful adjunct to our better knowledge of the more famous town.

The two together furnish examples of the town-planning of middle Italy of about 400-300 B.C., in days that are only half historic, and thus help to fill the gap between the Terremare and the fully developed system of the Roman Imperial period.
[50] Livy ii.

34, contradicted, however, by xxvii.