ARPINO (anc. ARPINUM), a town of Lazio, Italy, in the province of Frosinone, I,475ft. above sea-level; 12m, by rail N.W. of Roccasecca, a station on the older railway from Naples to Rome. Pop. (1931) 2,675 (town), 10,532 (commune). Arpino occupies the lower part of the ancient Volscian town finally taken from the Samnites by the Romans in 305 B.C. It received full civic privileges in 188 B.C. with Formiae and Fundi. The finely preserved polygonal walls are among the best in Italy, irft. high in places and 7ft. wide at the top. A single line of wall, with mediaeval round towers at intervals, runs on the north side from the present town of Civita Vecchia (2,0J5ft.), site of the old citadel. Below Arpino, in the valley of the Liris, lies the church of S. Domenico, on the site of the villa in which Cicero was born and often lived. The painter Giuseppe Cesari (156o-164o), more often known as the Cavaliere d'Arpino, was also born here.
See O. E. Schmidt, Arpinum, eine topographisch-historische Skizze (Meissen, 1900) .