MONOPOLI, a seaport town and episcopal see of Apulia, Italy, in the province of Bari, from which it is 25 m. S.E. by rail, 30 ft. above sea-level. Pop. (1901), 22,616. The medieval walls are preserved and the castle dates from 1552. The harbour is small, the principal trade being in agricultural products. Close to it are rock-hewn tombs, possibly belonging to the ancient Gnathia (q.v.).