ARPI (Gr. 'ApybpLaaa)  , an ancient city of . Apulia, 20 M . W. of the sea coast, and 5 M . N. of the modern Foggia . The legend attributes its foundation to Diomedes, and the figure of a horse, which appears on its coins, shows the importance of horse-breeding in early times in the district . Its territory extended to the sea, and Strabo says that from the extent of the city walls one could gather that it had once been one of the greatest cities of Italy . As a protection against the Samnites Arpi became an ally of Rome, and remained faithful until after the battle of Cannae, but Fabius captured it in 213 B.C., and it never recovered its former importance . It lay on a by-road from Luceria to Sipontum . No Roman inscriptions have, indeed, been found here, and remains of antiquity are scanty . Foggia is its medieval representative . (T .