Lactantius

“ Thus he spread the worship of himself through all lands. But at what time they lived can easily be inferred. For Thallus writes in his history, that Belus, the king of the Assyrians, whom the Babylonians worship, and who was the contemporary and friend of Saturnus, was three hundred and twenty-two years before the Trojan war, and it is fourteen hundred and seventy years since the taking of Troy. From which it is evident, that it is not more than eighteen hundred years from the time when mankind fell into error by the institution of new forms of divine worship. ”