The ancient fortitude of HALABYA is situated on the right shore of the Eufrate, to little distance of the twin one, ZALABYA, placed on the other bank of the river. The place in which fortitude rises has extraordinary suggestion, especially few before the sunset, when endless variations of color seem to multiply in the reflexes of the river. From the top of the ruins of the tower a splendid sight is dominated on the triangular boundary wall, whose square towers climb suddenly after having followed the banks of the Euphrates, as well as on the ochre stepposes hills that are extended by the other side of the river, beyond of a green cultivated strip. Two fortitudes were built in the III century AD from the Palmyirians to check a point in which the river could be easily forded, and to defend so from the raids of the Persians. To the same purpose the emperor Byzantine Giustiniano in the VI century reconstructed its boundaries.