Roman emperors Valentinian I and Valens issue a new law imposing stiffer restrictions against the Manichaeans.
Followers of the Persian prophet Mani, the Manichaeans believe that the world is locked in a struggle between good and evil, light and dark. Their religious system is an amalgamation of elements form Christianity, Buddhism, and Zoroastrianism.
This new Roman law states:
"Wherever an assembly of Manichaeans or such a gathering of this sort is found, their teachings shall be punished with a heavy penalty.
Those who assemble shall also be segregated from the company of men as infamous and ignominious, and the houses and habitations in which the profane doctrine is taught shall undoubtedly be confiscated." [CTh 16.5.3]