Patristic Reception

How St. Irenaeus of Lyons lived on in the tradition that followed him: the immediate debts of Hippolytus and Tertullian to his anti-gnostic argument, the portrait Eusebius preserved of him as theologian and peacemaker, the lineage of his “wonderful exchange” running forward to Athanasius and the doctrine of deification, his strange eclipse in Byzantium where his great work survived chiefly in a Latin translation while the Greek lingered only in florilegia, the destruction of his relics at Lyons in 1562, and his Orthodox liturgical commemoration as a hieromartyr on August 23.

Tradition: Pan-Orthodox (Church Father)

The Immediate Heirs: Hippolytus and Tertullian

Irenaeus’ Against Heresies (c. 180) was not a private treatise but a polemical arsenal, and the generation after him plundered it. His descriptions of gnostic doctrine, his arguments from apostolic succession, and his refutations passed almost immediately into the anti-heretical tradition: “Irenaeus’ polemical argumentation, especially his descriptions of the doctrines of his opponents, quickly entered and influenced the subsequent tradition — Hippolytus, Tertullian, and Epiphanius, amongst others, all drew upon his work” (Oxford Classical Dictionary, s.v. “Irenaeus”).

Hippolytus of Rome (c. 170–235) is the clearest case. His Refutation of All Heresies (the Philosophumenon) reproduces, often nearly verbatim, much of Irenaeus’ material on the Valentinians and other sects; Book VI in particular leans on Irenaeus so heavily that scholars use Hippolytus as a control on the transmitted text of Against Heresies itself. Hippolytus was, on the tradition reported by later sources, a hearer of Irenaeus or at least his close successor in the anti-gnostic project; whatever the biographical link, the literary dependence is beyond dispute.

Tertullian (c. 155–220), writing in Latin North Africa, names Irenaeus directly and draws on him structurally. His Adversus Valentinianos is in large part a Latin reworking and condensation of Irenaeus’ account of the Valentinian system, and Tertullian calls Irenaeus “a very careful inquirer into all kinds of doctrines” (Adversus Valentinianos 5). Tertullian’s De praescriptione haereticorum — with its argument that the heretics have no standing to appeal to Scripture because the apostolic churches hold the rule of faith — develops in juridical Latin idiom the very argument Irenaeus had pioneered in Against Heresies III. Through Tertullian, Irenaeus’ method became foundational for Latin theology. As the standard account puts it, “the first great Christian theologians — Irenaeus, Tertullian and Hippolytus — developed their systems in opposition to and partly also in acceptance of Gnostic ideas.”

Eusebius’ Portrait

Most of what is securely known about Irenaeus’ life comes not from Irenaeus himself but from Eusebius of Caesarea, whose Ecclesiastical History (c. 325) preserves both biographical notices and substantial verbatim fragments of works otherwise lost in Greek. Eusebius gives Irenaeus’ link to Polycarp and through him to the apostolic generation (HE 5.20, quoting Irenaeus’ Letter to Florinus), reproduces the list of his writings, and — crucially — twice shows him acting as a peacemaker, an emphasis Rome would seize on eighteen centuries later (see Modern Recovery).

First, Eusebius records that the confessors of the churches of Lyons and Vienne, during the persecution of c. 177, sent Irenaeus to Rome with a conciliatory letter to Bishop Eleutherus, commending him as “zealous for the covenant of Christ” (HE 5.4.2). Second, and more famously, when Bishop Victor of Rome moved around 190 to excommunicate the churches of Asia Minor over their Quartodeciman dating of Pascha, Irenaeus — true to his name (Eirēnaios, “peaceable”) — wrote to Victor “exhort[ing] him suitably and at length not to excommunicate whole churches of God for following a tradition of ancient custom” (HE 5.24.11). Eusebius preserves the rebuke, including Irenaeus’ reminder that the difference in fasting customs “confirms the agreement in the faith.” This portrait — the Eastern-born bishop of a Western see who keeps the peace between the churches — became the dominant image of Irenaeus in the tradition.

The Exchange Formula and Its Lineage to Athanasius

Irenaeus’ most enduring theological bequest was soteriological. In the preface to Book V of Against Heresies he states the principle that the later tradition would call the admirabile commercium, the “wonderful exchange”: the Word of God “did, through his transcendent love, become what we are, that he might bring us to be even what he is himself” (Irenaeus, Against Heresies V, preface; trans. ANF 1). He grounds it in recapitulation (anakephalaiōsis): Christ “summed up” the whole of human nature in himself in order to heal it from within (see Exchange and Deification and Anakephalaiosis).

This formula is the patristic ancestor of the most famous sentence in Greek soteriology. Athanasius of Alexandria, inheriting the exchange from Irenaeus, gave it its lapidary form: “He became man that we might be made God” (On the Incarnation 54.3; trans. NPNF II/4). The continuity is direct and is recognized as such in the secondary literature: Athanasius’ theology of deification takes up Irenaeus’ exchange and presses it into service against the Arians, since only a Word who is God by nature could actually make creatures divine. The lineage runs onward through the Cappadocians to Maximus the Confessor and Gregory Palamas, where the essence–energies distinction secures the formula against the charge of a pantheist confusion. The cross-collection treatment of this inheritance is given in Theosis in Athanasius, which names Irenaeus explicitly as the formula’s “classic patristic ancestor.”

It is worth stressing what Irenaeus does and does not say. He does not teach that human beings become God by nature or essence; the exchange is by grace, adoption, and participation, the gift of incorruption and the vision of God. His “the glory of God is the living man, and the life of man is the vision of God” (Against Heresies IV.20.7) belongs to the same vision (see Glory of God, Living Man).

The Byzantine Eclipse: A Latin-Only Survival

Given his standing as the first great theologian of the Church, Irenaeus’ relative disappearance from later Byzantine theology is striking — and the cause is largely textual. Against Heresies was written in Greek, but the work survives complete only in an early, extremely literal Latin translation (probably fourth-century), so wooden that scholars often reconstruct the underlying Greek word-for-word from it. The Greek original was read into the early Byzantine period — it was still being excerpted in the sixth and seventh centuries — but no complete Greek manuscript survived the medieval period. Books IV and V also survive in an Armenian version, alongside the whole of the Demonstration of the Apostolic Preaching, recovered in Armenian only in 1904 (see Epideixis).

What survived of the Greek in the East survived in fragments: quotations and excerpts gathered into florilegia (anthologies of patristic proof-texts), in Eusebius, in the Sacra Parallela attributed to John of Damascus, in the catenae, and in the acts of councils. Irenaeus continued to be cited as an authority — he is quoted, for example, in the dossiers of the iconoclast controversy and at the councils — but he was received in excerpts rather than read whole.

Several causes converged in this eclipse. The most obvious is the loss of the complete Greek text itself: a long, technical, polemical work aimed at second-century gnostic sects had limited appeal once those particular sects had passed, and the dogmatic energy of the Greek East shifted to the Trinitarian and Christological controversies of the fourth and fifth centuries, where Athanasius, the Cappadocians, and Cyril were the reference points. Irenaeus’ characteristic concerns — recapitulation, the unity of the two Testaments, the goodness of the flesh against the gnostics — were absorbed into the common stock of the tradition without his name always attached. The combined effect was that the Byzantine East inherited Irenaeus’ conclusions (the rule of faith, apostolic succession, the exchange) more than his text, and the Latin West held the only complete copy of his masterwork. This is precisely the irony that the modern “Irenaean renaissance” had to overcome — the first great catholic theologian had become, in practice, a Latin author preserved by his translators.

The Relics and the Tomb at Lyons

According to the Lyonnais tradition, Irenaeus was buried beneath the church of Saint John in Lyons, which was subsequently renamed in his honor — the church of Saint-Irénée. He is venerated as a martyr, though the historical evidence for a martyr’s death (traditionally placed c. 202, under Septimius Severus) rests on later testimony rather than on contemporary record; the earliest sources, including Eusebius, do not narrate his martyrdom, and the tradition that he died a martyr first becomes explicit in Jerome and Gregory of Tours. The collection treats the martyrdom as a venerable tradition pinned to its attestation rather than as documented fact (per the repository methodology).

The fate of his relics is better documented than their authenticity. In 1562, during the French Wars of Religion, Calvinist (Huguenot) forces sacked the church of Saint-Irénée: the crypt was profaned, the tombs of the martyrs broken open, and the bones — including those venerated as Irenaeus’ — scattered and destroyed. As the standard accounts put it, the shrine “was destroyed by the Calvinists in 1562, and all trace of his relics seems to have perished” (cf. OrthodoxWiki, “Irenaeus of Lyons,” tracing the older Catholic encyclopedic notices). The church was later rebuilt and the crypt restored in the following century; it still stands in Lyons, but the original relics did not survive the destruction. Small relics circulated elsewhere in Europe are of uncertain provenance relative to the lost shrine.

Orthodox Liturgical Commemoration (August 23)

The Orthodox Church commemorates Irenaeus as a hieromartyr (a martyr-bishop). The Eastern commemoration falls on August 23 — distinct from the Western (Roman Catholic) feast, which since the post-conciliar reform of the calendar is kept on June 28. The Orthodox Church in America and the Greek tradition list “the Hieromartyr Irenaeus, Bishop of Lyons” on August 23, with the synaxarion recalling his birth at Smyrna, his discipleship under Polycarp (and so his living link to the apostle John), his episcopate in Gaul, his writings against the heresies, and his martyrdom. The dating of his birth varies in the sources between roughly 130 and 140, and his repose is traditionally given as c. 202; the collection presents these as the tradition’s figures rather than as fixed dates (see From Smyrna to Lyons).

The liturgical memory thus preserves exactly the double identity that the patristic reception had fixed: the bridge-figure born in the Greek East who became a pastor and martyr of the Latin West, the disciple of Polycarp who handed the apostolic faith forward whole.

References

Irenaeus of Lyons. Against Heresies (Adversus Haereses). Trans. ANF 1; critical text in Sources Chrétiennes 100, 152–153, 210–211, 263–264, 293–294 (ed. A. Rousseau, L. Doutreleau et al.). Cited here esp. III (apostolic succession), IV.20.7 (the vision of God), and V, preface (the exchange).
Athanasius of Alexandria. On the Incarnation 54 [PG 25:192B]. Trans. NPNF II/4; cf. trans. Behr, Popular Patristics Series 44a/44b.
Eusebius of Caesarea. Ecclesiastical History, Book 5 (esp. 5.4.2; 5.20; 5.24.11). Trans. NPNF II/1.
Hippolytus of Rome. Refutation of All Heresies (Philosophumenon). Trans. ANF 5.
Tertullian. Adversus Valentinianos 5; De praescriptione haereticorum. Trans. ANF 3.
Behr, John. Irenaeus of Lyons: Identifying Christianity. Oxford: Oxford University Press, 2013 — on the transmission, the sources, and Irenaeus’ theological vision.
Osborn, Eric. Irenaeus of Lyons. Cambridge: Cambridge University Press, 2001.
“Irenaeus” (s.v.), Oxford Classical Dictionary — on the influence on Hippolytus, Tertullian, and Epiphanius.
“Irenaeus of Lyons.” OrthodoxWiki (used to locate the relic tradition and the August 23 commemoration; the destruction of the Lyons shrine in 1562 and the loss of the relics cross-checked against the older Catholic encyclopedic notices).
Orthodox Church in America. Liturgical calendar, August 23 (Hieromartyr Irenaeus, Bishop of Lyons). oca.org.