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The New Testament Canon

How 27 books survived the ancient gauntlet of canonization—and the texts that almost made the cut.

The New Testament canon was not decreed into existence by a single council. It crystallized over roughly three centuries of liturgical use, theological debate, and regional disagreement—and it was not until 367 AD, in Athanasius of Alexandria’s 39th Festal Letter, that any surviving document named the exact 27 books we recognize today.

Published Entries

Each entry is a standalone essay on authorship, purpose, and canonization. Books are ranked by degree of opposition—from the twenty never seriously questioned to the four that nearly didn’t survive the cut.

Part 1: The 27 Canonical Books by Degree of Opposition

Tier 1—Twenty Books the Early Church Almost Never Questioned

Eusebius placed these among the homologoumena (“acknowledged”) in Ecclesiastical History 3.25 (c. 325), a larger category that also included Hebrews and (conditionally) Revelation. The twenty books listed here faced essentially no serious doubt.

  • Matthew
  • Mark (coming soon)
  • Luke (coming soon)
  • John (coming soon)
  • Acts of the Apostles (coming soon)
  • Romans (coming soon)
  • 1 Corinthians (coming soon)
  • 2 Corinthians (coming soon)
  • Galatians (coming soon)
  • Ephesians (coming soon)
  • Philippians (coming soon)
  • Colossians (coming soon)
  • 1 Thessalonians (coming soon)
  • 2 Thessalonians (coming soon)
  • 1 Timothy (coming soon)
  • 2 Timothy (coming soon)
  • Titus (coming soon)
  • Philemon (coming soon)
  • 1 Peter (coming soon)
  • 1 John (coming soon)

Tier 2—Three Books That Weathered Real but Manageable Opposition

Disputed in certain regions or by certain fathers, but with enough widespread support that their inclusion was never deeply imperiled.

  • Hebrews
  • James (coming soon)
  • Jude (coming soon)

Tier 3—Four Books That Nearly Didn’t Survive the Cut

Major voices argued against their inclusion. Their canonical status remained genuinely contested well into the 4th century or later.

  • 2 Peter
  • 2 John (coming soon)
  • 3 John (coming soon)
  • Revelation (coming soon)

Part 2: Texts That Almost Made the Cut

Tier 4—Five Near-Misses Included in Major Codices or Canonical Lists

Appeared in canonical lists, treated as scripture by major fathers, or physically included in the great 4th–5th century codices alongside canonical books.

  • The Shepherd of Hermas
  • 1 Clement (coming soon)
  • The Epistle of Barnabas (coming soon)
  • The Didache (coming soon)
  • The Apocalypse of Peter (coming soon)

Tier 5—Texts with Significant but Regionally Confined Support

Treated as canonical or near-canonical in specific regional traditions but never achieved broader acceptance across the Christian world.

  • The Gospel of the Hebrews (coming soon)
  • The Acts of Paul (coming soon)
  • 3 Corinthians (coming soon)
  • The Preaching of Peter (coming soon)

Tier 6—Texts Valued by Orthodox Christians but Rarely Considered Canonical

Circulated broadly for devotional or instructional use and were occasionally cited as authoritative, but never serious contenders in most regions.

  • 2 Clement (coming soon)
  • The Letters of Ignatius (coming soon)
  • Polycarp’s Letter to the Philippians (coming soon)
  • Tatian’s Diatessaron (coming soon)
  • The Wisdom of Solomon (coming soon)