A number of leather codices were found at Nag Hammadi in Southern Egypt in 1945. They are Coptic translations of Greek Gnostic documents. They likely belonged to an Egyptian monastery were disposed of after Gnostic literature was categorically rejected by decree of St. Athanasius of Alexandria.

The leather bound volumes contain the following works. They are mostly Valentinian Gnostic texts that were popularized in Egypt after the second century A.D.

Codex I (The Jung Codex)
The Prayer of the Apostle Paul
The Apocryphon of James
The Gospel of Truth
The Treatise on the Resurrection
The Tripartite Tractate

Codex II
The Apocryphon of John
The Gospel of Thomas a sayings gospel
The Gospel of Philip a sayings gospel[citation needed]
The Hypostasis of the Archons
On the Origin of the World
The Exegesis on the Soul
The Book of Thomas the Contender

Codex III
The Apocryphon of John
The Gospel of the Egyptians
Eugnostos the Blessed
The Sophia of Jesus Christ
The Dialogue of the Saviour

Codex IV
The Apocryphon of John
The Gospel of the Egyptians

Codex V
Eugnostos the Blessed
The Apocalypse of Paul
The First Apocalypse of James
The Second Apocalypse of James
The Apocalypse of Adam

Codex VI
The Acts of Peter and the Twelve Apostles
The Thunder, Perfect Mind
Authoritative Teaching
The Concept of Our Great Power
Republic by Plato [The original is not gnostic, but the Nag Hammadi library version is heavily modified with current gnostic concepts.]
The Discourse on the Eighth and Ninth – a Hermetic treatise
The Prayer of Thanksgiving (with a hand-written note) – a Hermetic prayer
Asclepius 21-29 – another Hermetic treatise

Codex VII
The Paraphrase of Shem
The Second Treatise of the Great Seth
Gnostic Apocalypse of Peter
The Teachings of Silvanus
The Three Steles of Seth

Codex VIII
Zostrianos
The Letter of Peter to Philip

Codex IX
Melchizedek
The Thought of Norea
The Testimony of truth

Codex X
Marsanes

Codex XI
The Interpretation of Knowledge
A Valentinian Exposition, On the Anointing, On Baptism (A and B) and On the Eucharist (A and B)
Allogenes
Hypsiphrone

Codex XII
The Sentences of Sextus
The Gospel of Truth
Fragments

Codex XIII:
Trimorphic Protennoia
On the Origin of the World