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christian-theology-properfeatured in 40 works

The Holy Trinity

One God in three coequal, coeternal persons: Father, Son, and Holy Spirit

The doctrine of the Holy Trinity confesses that God is one essence, or ousia, in three coequal and coeternal persons, the Father, the Son, and the Holy Spirit. Early terms appear in Theophilus and Tertullian, and the faith was confessed at the Council of Constantinople in 381. It is affirmed across all the major Christian communions, though questions of the inner relations, such as the filioque, are contested separately.

How it traveled

  1. John
    Ephesus · 100
    explains
  2. Against Heresies: Book III
    Lyons · 202
    explains
  3. Against Praxeas.
    — · 220
    explains
  4. A Treatise of Novatian Concerning the Trinity.
    Rome · 258
    explains
  5. The Life of Constantine with Orations of Constantine and Eusebius
    Caesarea · 339
    explains
  6. The Church History of Eusebius
    Caesarea · 339
    explains
  7. Against the Arians. (Orationes contra Arianos IV.)
    Alexandria · 373
    explains
  8. On the Councils of Ariminum and Seleucia. (De Synodis.)
    Alexandria · 373
    explains
  9. De Spiritu Sancto
    Caesarea (Cappadocia) · 379
    explains
  10. The Letters
    Caesarea (Cappadocia) · 379
    explains
  11. The Catechetical Lectures of S. Cyril
    Jerusalem · 386
    explains
  12. Select Orations of Saint Gregory Nazianzen
    Nazianzus · 390
    explains
  13. Against Eunomius
    Nyssa · 395
    explains
  14. The Great Catechism
    Nyssa · 395
    explains
  15. Answer to Eunomius' Second Book
    Nyssa · 395
    explains
  16. Exposition of the Christian Faith
    Milan · 397
    explains
  17. On the Holy Spirit
    Milan · 397
    explains
  18. The Homilies of St. John Chrysostom on the Gospel of St. John
    Constantinople (Istanbul) · 407
    explains
  19. The Commentary and Homilies of St. John Chrysostom on Galatians and Ephesians
    Constantinople (Istanbul) · 407
    explains
  20. A Commentary on the Apostles' Creed
    Aquileia · 411
    explains
  21. The Letters of St. Jerome
    Bethlehem · 420
    explains
  22. Jerome and Gennadius. Lives of Illustrious Men
    Bethlehem · 420
    explains
  23. On the Holy Trinity
    Hippo Regius · 430
    explains
  24. Lectures or Tractates on the Gospel According to St. John
    Hippo Regius · 430
    explains
  25. The Confessions
    Hippo Regius · 430
    explains
  26. City of God
    Hippo Regius · 430
    explains
  27. Sermons on Selected Lessons of the New Testament
    Hippo Regius · 430
    explains
  28. Reply to Faustus the Manichæan
    Hippo Regius · 430
    explains
  29. Letters of St. Augustin
    Hippo Regius · 430
    explains
  30. Expositions on the Book of Psalms
    Hippo Regius · 430
    explains
  31. The Ecclesiastical History, Dialogues, and Letters of Theodoret
    Cyrrhus · 458
    explains
  32. The Letters and Sermons of Leo the Great
    Rome · 461
    explains
  33. John of Damascus: Exposition of the Orthodox Faith
    Damascus · 749
    explains
  34. Monologium
    Canterbury · 1109
    explains
  35. Treatise on The Most Holy Trinity (QQ[27-43])
    Paris · 1274
    explains
  36. Treatise on the Incarnation (qq[1]-59)
    Paris · 1274
    explains
  37. Treatise on the Sacraments (qq[60]-90)
    Paris · 1274
    explains
  38. Treatise on The One God (QQ[2-26])
    Paris · 1274
    explains
  39. Treatise on Man (qq[75]-102)
    Paris · 1274
    explains
  40. Book First. of the Knowledge of God the Creator
    Geneva · 1564
    explains

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Modern and living teachers whose books take up The Holy Trinity. These works are still in copyright, so we can’t show the text here — each links out to the book.