Troia (also formerly Troja; Foggiano: Troië; Ancient Greek: Αῖκαι, romanized: Aîkai; Latin: Aecae) is a town and comune in the province of Foggia and region of Apulia in southern Italy.

Aecae was mentioned both by Polybius and Livy, during the military operations of Hannibal and Quintus Fabius Maximus Verrucosus in Apulia.

In common with many other Apulian cities it had joined the Carthaginians after the battle of Cannae, but was recovered by Fabius Maximus in 214 BC, though not without a regular siege.

[4] This interval exactly accords with the position of the modern city of Troia, and confirms the statements of several chroniclers of the Middle Ages, that the latter was founded about the beginning of the 11th century, on the ruins of the ancient Aecae.

Cluverius (1580–1622) erroneously identified Aecae with Accadia, a village in the Daunian Mountains south of Bovino; but his error was rectified by Holstenius.