Caelia, the name of two ancient cities in Italy, (1) In Apulia (mod. Ceglie di Bari) on the Via Traiana, 5 m. S. of Barium. Coins found here bearing the inscription καιλίνων prove that it was once an independent town. Discoveries of ruins and tombs have also been made. (2) In Calabria (mod. Ceglie Messapica) 25 m. W. of Brundusium, and 991 ft. above sea-level. It was in early times a place of some importance, as is indicated by the remains of a prehistoric enceinte and by the discovery of several Messapian inscriptions.
See Ch. Hülsen in Pauly-Wissowa, Realencyclopadie, iii. 1252.