TATIUS, ACHILLES, a native of Alexandria, was the author of a book on the sphere, which Father Petau translated into Latin. There is also attributed to him a Greek romance on the loves of Leucippe and Clitophon, of which Salmasius has given a beautiful edition in Greek and Latin with notes. Suidas says, that this Achilles Tatius was a Pagan, but that he afterwards embraced the Christian religion, and became a bishop. Photius mentions him in his Bibliotheca.