The Living Tradition An Orthodox Archive of the Church Fathers and Early Church

Ecclesiastical writer

Eusebius of Caesarea

Also known as Eusebius Pamphili

The first Church historian, without whom the pre-Nicene Church would be largely unknown to us — and an interested party in the fourth-century disputes he narrates. He is not a canonised Father.

  • Historical consensusBroadly agreed among historians working from the surviving evidence. Consensus can shift when the evidence or the method changes.
  • Disputed historyHistorians genuinely disagree. The page gives the range the evidence supports rather than choosing the most striking version.
  • Individual patristic opinionThe view of a particular Father that the Church has not received as its own teaching. The Fathers are not individually infallible: some speculated, some changed their minds, some were later corrected.

Primary evidence verified Content last reviewed 2026-08-29

What still needs checking (2)
  • Confirm the Orthodox account of Eusebius's status against an official Orthodox source.
  • Add tier D scholarship on the current assessment of his reliability and of his theological position.

Report an accuracy issue on this page

Read aloud. Your browser speaks the page using the voices installed on this device. Nothing is uploaded — the text never leaves your computer. Voice quality varies by browser and device.

Dates
around 260 - around 340 — Both dates approximate.
Region
Palestine
See
Caesarea in Palestine
Language of composition
Greek

Life

Eusebius was a pupil and friend of the martyr Pamphilus at Caesarea, where Origen's library had ended up, and he used it. He became bishop of Caesarea and lived through the last great persecution and the reign of Constantine, whose panegyrist he became.

His Church History, in ten books, is the first attempt to write the history of the Church from the apostles to his own day. It quotes extensively from documents that have otherwise perished, which is why it is indispensable: a great deal of what we know about the second and third centuries survives only because Eusebius copied it out.

Works

Generally accepted as authentic

Theological and spiritual contribution

Book III chapter 25 of the Church History is the single most useful ancient survey of which Christian writings were universally acknowledged, which were disputed, and which were rejected. Eusebius's threefold sorting is the closest thing the pre-Nicene Church has to a report on the state of the question.

He also preserved the succession lists of the great sees, the letters of second- and third-century bishops, and the accounts of the martyrs, and devised the canon tables that let a reader compare parallel passages across the four Gospels.

Controversy and reception

Eusebius was not a neutral observer of the Arian crisis. He was excommunicated at a synod at Antioch shortly before Nicaea, was restored at the council after submitting a creed, and afterwards supported moves against Athanasius. Ancient and modern writers have variously described his theology as Arian, semi-Arian, or an older subordinationist position that the fourth century left behind. This page records the dispute and does not resolve it.

This site therefore classifies him as an ecclesiastical writer. He is not a canonised Father of the Orthodox Church, and treating him as one — or, equally, treating his history as untrustworthy because of his politics — would misrepresent the case.

In their own words

Every quotation below was located in the archived text of the edition named, at the locator given, by the build's own quotation check.

Since we are dealing with this subject it is proper to sum up the writings of the New Testament which have been already mentioned. First then must be put the holy quaternion of the Gospels; following them the Acts of the Apostles.

Church History, Book III, Book III, Chapter 25.1 Nicene and Post-Nicene Fathers, Second Series, Vol. I, trans. Arthur Cushman McGiffert — public domain Read this work in the archive

  • Origen

    The greatest biblical scholar of the ancient Church and the source of much later exegesis, condemned by name in the sixth century. His influence and his condemnation are both real and neither cancels the other.

    Father or writer

  • The First Council of Nicaea

    The council that confessed the Son to be of one substance with the Father, addressed the date of Pascha, and issued twenty disciplinary canons. It did not decide which books belong to the Bible.

    Council

  • Eusebius sorts the writings

    A historian's report on which writings were universally acknowledged, which disputed, and which rejected — including his own inconsistency.

    Canon-of-Scripture witness

  • How Scripture was formed

    A gradual ecclesial process, not a single decision — and certainly not one taken at Nicaea.

    Theme

Your notes

Stored in this browser only. Never uploaded, never visible to anyone else, and marked as your own words if you add this page to a study packet.

Sources for this page

  1. Tier C Eusebius: Church History, Life of Constantine, Oration in Praise of Constantine Philip Schaff and Henry Wace (eds.); Arthur Cushman McGiffert (trans.) Church History, Book III, Chapter 25 translated edition of primary texts The acknowledged, disputed and rejected writings. Source record
  2. Tier C Eusebius: Church History, Life of Constantine, Oration in Praise of Constantine Philip Schaff and Henry Wace (eds.); Arthur Cushman McGiffert (trans.) Church History, Book VI translated edition of primary texts On Origen, and on the library at Caesarea. Source record
  3. Tier C The Seven Ecumenical Councils of the Undivided Church Henry R. Percival (ed.); Philip Schaff and Henry Wace (series eds.) The First Council of Nice: Historical Introduction annotated edition of conciliar texts On Eusebius's part in the council. Source record

Tiers are explained in the methodology. No page on this site has been reviewed or approved by any bishop, priest, synod or seminary.