ALERIA, ALALIA, or ALARIA, in Ancient Geography, a town of Corsica, situated near the middle of the east side of the island, on an eminence, near the mouth of the river Rotanus mentioned by Ptolemy; built by the Phœcians (Diodorus Siculus). Afterwards Sylla led a colony thither. It is now in ruins, and called Aleria Distrutta.