Quartz crystal sealstone (2.9 cm in diameter, 0.9 cm thick), known as the "sealstone of Mani". The stone bears the intaglio busts of three devotees of Manichaeism, the faith founded by the Mesopotamian prophet and thinker Mani (ca. 216-277 CE). Syncretizing many other faiths and religious movements of his day, including Christianity (both "orthodox" and Gnostic), Zoroastrianism, and Buddhism, Mani conceived of the cosmos as entrapped in a ferocious struggle between the Kingdom of Light and the Kingdom of Darkness. His Manichaean followers were divided into two groups: the Elect, who purified their bodies through a rigorous regime of diet and sexual abstinence in order to attain the Kingdom of Light, and the "Hearers," who attended upon the Elect and whose hopes for salvation depended upon the Elect's prayers for them. Among the later "Hearers" of Manichaeism was the future St. Augustine of Hippo.
The inscription surrounding the three figures on this sealstone is in Syriac, the lingua franca of the Near East in late antiquity. It reads M’ny šlyḥ’ d-yyšw‘ mšyḥ, "Mani, messenger of the Messiah"--a frequent salutation used by Mani to his followers in his preserved letters. It is thus possible, though not certain, that this sealstone was used by Mani himself to seal his documents. It now resides in the Cabinet des Médailles, Paris.