Gibbon, The History of Decline and Fall of the Roman Empire

Circesium, on the frontier of the two empires, now Kerkesia; placed in the angle formed by the juncture of the Chaboras, or al Khabour, with the Euphrates. This situation appeared advantageous to Diocletian, that he raised fortifications to make it the but wark of the empire on the side of Mesopotamia. D’Anville. Geog. Anc. ii. 196.—G. It is the Carchemish of the Old Testament, 2 Chron. xxxv. 20. ler. xlvi. 2