GRUMENTUM, an ancient town in Lucania, 33 m. S. of Potentia by direct road through Anxia, and 52 m. by the Via Her culia, at the point of divergence of a road eastward to Heraclea. It seems to have been native Lucanian, not a Greek settlement. In 215 B.C. the Carthaginian general Hanno was defeated under its walls, and in 207 B.c. Hannibal made it his headquarters. In the Social War its strong fortress seems to have been held by both sides at different times. Its site is a ridge on the right bank of the Aciris (Agri) about 1,960 ft. above sea-level, 2 m. below the modern Saponara, which lies much higher (2,533 ft.). Its ruins (all of the Roman period) include those of its enceinte in opus reticulatum, with scanty traces of a large amphitheatre (arena 205 by 197 ft.), the only one in Lucania, except that at Paestum.