POZZUOLI (anc.

See also:

• PUTEOLI (mod. Pozzuoli, q.v.)

Puteoli, q.v.)  , a seaport and episcopal see of Campania, Italy, in the province of Naples, 7-1 m . W. of it by rail . Pop . (1906), 17,017 (town); 22,838 (commune) . It is situated on and at the base of a hill projecting into the bay at Pozzuoli, separated from the main portion of the Gulf of Naples by the promontory of Posilipo . Its mineral baths are frequented in summer; and the volcanic pozzolana earth (also found near Rome), used now as in Roman times for making cement and concrete, derives its name from the place . In the middle ages Pozzuoli was frequently sacked and also damaged by the natural convulsions of 1198 and 1538 . To the north-east of the town is the Solfatura, a half extinct volcano crater, in which sulphurous gases are exhaled .