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

The seven ecumenical councils — lesson 1

What makes a council ecumenical

Before the seven: how the Church decides that a council speaks for it.

  • Received Orthodox teachingTaught consistently and received throughout the Orthodox Church, though not necessarily formulated in a conciliar definition. This is not a claim that no Father ever wrote differently.
  • 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.

Primary evidence verified Content last reviewed 2026-08-29

What still needs checking (1)
  • Confirm against an official Orthodox source how the councils after 787 are described and whether they are numbered.

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What this lesson covers

  • State what does and does not make a council ecumenical.
  • Name councils that claimed the status and were not received.
  • Explain why Orthodox usage does not number the councils after 787 uniformly.

About 7 minutes to read.

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There is no procedure that makes a council ecumenical. There is no quorum, no list of required sees, and no form of words a council can pronounce over itself. What settles it is that the Church receives what the council confessed as its own faith.

That sounds circular until you look at the history, where it is simply what happened.

Constantinople, 381
An Eastern council with no Western participation, not called ecumenical when it met, and not recognised as such at Rome for a long period. It is the second ecumenical council because the Church came to confess its Creed.
Ephesus, 449
Convoked as an ecumenical council by the emperor, presided over by the archbishop of Alexandria, and rejected. Leo of Rome called it a robbery and the name stuck.
Hiereia, 754
Called itself the seventh ecumenical council, had over three hundred bishops, and was rejected. Its definition is archived here so you can read what it actually said.

After 787

The practical consequence for a reader is that the question to ask of any conciliar text is not how impressive the gathering was, but whether the Church received what it said.

Key Scripture

  • Acts 15:22 — It seemed good to the apostles and elders, with the whole church.
  • Acts 15:28 — It seemed good to the Holy Spirit and to us.

On Scripture references. References are given so you can read the passage in the translation your parish uses. This site does not reproduce a modern copyrighted Bible text.

Council and canon connections

  • Trullo, 692 supplies the canons of the Fifth and Sixth Councils and is not itself counted as ecumenical.

Why this matters in lived Orthodoxy

This is why the seven councils are commemorated liturgically and why their definitions are confessed rather than merely studied. It is also why Orthodox theology can say that a council is authoritative without holding that any assembly of bishops is automatically right.

Review

What makes a council ecumenical?
Reception by the whole Church of what the council confessed — not the emperor, the numbers, or the council's own claim.
Name two councils that claimed the status and were not received.
Ephesus in 449, which Leo called a robbery, and Hiereia in 754, which called itself the seventh ecumenical council.
How does this site number the councils after 787?
It does not. It names them, because Orthodox usage does not agree on numbering them.

Your notes

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Going deeper

Sources for this page

  1. Tier C The Seven Ecumenical Councils of the Undivided Church Henry R. Percival (ed.); Philip Schaff and Henry Wace (series eds.) General Introduction: Concerning Ecumenical Councils in General annotated edition of conciliar texts Source record
  2. Tier C The Seven Ecumenical Councils of the Undivided Church Henry R. Percival (ed.); Philip Schaff and Henry Wace (series eds.) The Number of Ecumenical Synods annotated edition of conciliar texts Source record
  3. Tier C The Seven Ecumenical Councils of the Undivided Church Henry R. Percival (ed.); Philip Schaff and Henry Wace (series eds.) Excursus on the Authority of the Second Ecumenical Council annotated edition of conciliar texts Source record
  4. Tier C The Seven Ecumenical Councils of the Undivided Church Henry R. Percival (ed.); Philip Schaff and Henry Wace (series eds.) Epitome of the Definition of the Iconoclastic Conciliabulum held in Constantinople, 754 annotated edition of conciliar texts 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.