CIRTA, an ancient city of Numidia (mod. Constantine, q.v.), in Africa, in the country of the Massili. The Romans made it their road focus and strongest Numidian fortress. The early em perors neglected it, but Constantine restored it (whence mod. name) . Though several Roman structures survived till recently all that remains is a part of a bridge (Pont d'Antonin) and six arches, each some 6oft. high, of an aqueduct over the Rumel valley.
See Ch. Vars, Cirta (Paris and Constantine, 1895).