In Christian theology, a heresiarch (also hæresiarch, according to the Oxford English Dictionary; from Greek: αἱρεσιάρχης, hairesiárkhēs via the late Latin haeresiarcha[1]) or arch-heretic is an originator of heretical doctrine or the founder of a sect that sustains such a doctrine.
[1] In his Divine Comedy, Dante Alighieri represents the heresiarchs as being immured in tombs of fire in the Sixth Circle of Hell.
In Cantos IX and X of the Inferno, Virgil describes the suffering these souls experience, saying "Here are the Arch-Heretics, surrounded by every sect their followers... / Like with like is buried, and the monuments are different in degrees of heat.
"[4] Among the historical figures that Dante specifically lists as arch-heretics are Epicurus, Farinata Degli Uberti, Frederick I of Sicily, and Pope Anastasius II.
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