HALUNTIUM (Gr. 'AXbvrwv, mod. S. Marco d'Alunzio)  , an ancient city of Sicily, 6 m. from the north coast and 25 M . E.N.E. of Halaesa . It was probably of Sicel origin, though its foundation was ascribed to some of the companions of Aeneas . It appears first in Roman times as a place of some importance, and suffered considerably at the hands of Verres . The abandoned church of S . Mark, just outside the modern town, is built into the cella of an ancient Greek temple, which measures 62 ft. by 18 . A number of ancient inscriptions have been found there .