Irenaeus of Lyons St. Irenaeus of Lyons, Bishop and Hieromartyr Εἰρηναῖος Λουγδούνου · Irenaeus Lugdunensis Dates 125–202 (approx.) SeeLyons (Lugdunum) VenerationHieromartyr Works (6) Against Heresies: Book I (ANF) Against Heresies: Book II (ANF) Against Heresies: Book III (ANF) Against Heresies: Book IV (ANF) Against Heresies: Book V (ANF) Fragments from the Lost Writings of Irenæus (ANF)