A city of ancient Italy, overwhelmed in A.D. 79 along with Pompeii and Stabiae by an eruption of Vesuvius, at the north-western base of which it was situated, 5 m. E. of Naples; so completely was it buried by the ashes and lava that its site was completely obliterated, and in time two villages sprang up on the new surface, 40 to 100 ft. below which lay the buried city; relics were discovered while deepening a well in 1706, and since then a considerable portion of the town has been excavated, pictures, statues, etc., of the greatest value having been brought to light.