Frosinone (anc. Frusino), a town of Italy in the province of Rome, from which it is 53 m. E.S.E. by rail. Pop. (1901) town, 9530; commune, 11,029. The place is picturesquely situated on a hill of 955 ft. above sea-level, but contains no buildings of interest. Of the ancient city walls a small fragment alone is preserved, and no other traces of antiquity are visible, not even of the amphitheatre which it once possessed, for which a ticket (tessera) has been found (Th. Mommsen in Ber. d. Sächsischen Gesellschaft d. Wissenschaften, 1849, 286). It was a Volscian, not a Hernican, town; a part of its territory was taken from it about 306-303 B.C. by the Romans and sold. The town then became a praefectura, probably with the civitas sine suffragio, and later a colony, but we hear nothing important of it. It was situated just above the Via Latina.