Irenaeus of Lyon

130–140 to 200–203 · Doctor 2022

Origin: Smyrna / Asia Minor, probably
Historical identity: Greek-speaking Christian of Asia Minor; bishop in Roman Gaul
Affiliation: Secular clergy / no religious order

Life and work

A bishop and theologian linking the churches of Asia Minor, Rome and Gaul. His account of apostolic tradition and opposition to Gnosticism made him a major witness to second-century Christianity.

Places and activities

Smyrna

c. 130-160; youth

Learned from Polycarp.

Benedict XVI: Irenaeus of Lyons

Lyon / Lyons

177-c. 202/203; with travel

Served as presbyter and then bishop; wrote against Gnostic teachers.

Benedict XVI: Irenaeus of Lyons

Rome

177

Carried the Lyon church's letter to Pope Eleutherius.

Benedict XVI: Irenaeus of Lyons

Journeys

c. 177-178: Returned to Lyon and succeeded Pothinus as bishop.

177: Mission from Lyon to Rome bearing the community's letter.

Catholic Encyclopedia

Catholic Encyclopedia: St. Irenaeus

Primary sources

Further reading

Wikipedia

Irenaeus of Lyon

Dates and research notes

Birth c. 130-140 and death c. 200-203 are uncertain. Martyrdom is not treated as established.

Selected sourced locations; not a complete itinerary. All geographic coordinates are approximate.

Lifetime associations, not citizenship or a claim that all affiliations were held simultaneously.

Official modern biographical overview; not contemporary evidence for the saint's travels.

The Catholic Encyclopedia, 1910. Biographical article.

Primary text or author archive. Its presence in the bibliography does not by itself support every map claim.

Oxford University Press, 2011. Recommended reference; consult the relevant entry and its bibliography. Not treated as read evidence for individual seed claims.

Updated 2026-11-01