Early Church Fathers

1 Clement (ca. 95 AD)

Letters of St. Ignatius (ca. 110 AD)
Ephesians Magnesians
Philadelphians Romans
Smyrneans Tralleans
To Polycarp

St. Polycarp's Epistle to the Philippians (ca. 130 AD)
Epistle of St. Barnabas (ca. 130 AD)
2 Clement (ca. 150 AD)
Shepherd of Hermas

St. Justin Martyr (Early-Mid 2nd century)
First Apology Second Apology
Hortatory Address to the Greeks On the Sole Government of God
On the Resurrection

St. Irenaeus' "Against Heresies" (Mid-Late 2nd century)
Book One Book Two
Book Three Book Four
Book Five

St. Tertullian (2nd / 3rd centuries)
Patience Prayer Spectacles
To the Martyrs

"De Principiis" by Origen (2nd / 3rd centuries)
St. Eusebius of Caesarea's "Church History" (3rd / 4th centuries)
"The Pearl" by St. Ephraim of Syria (4th century)

St. Athanasius (3rd / 4th centuries)
On the Incarnation Defense Against the Arians
Life of St. Anthony Four Discourses Against the Arians

"The Great Cathechism" of St. Gregory of Nyssa (4th century)

Epistles of St. Basil the Great (4th century)
Second Seventh Eighth

St. John Chrysostom (4th / 5th centuries)
On Matthew On John and Hebrews
On Acts and Romans On Galatians and Ephesians
On Philippians, Colossians, & Thessalonians On the Pastoral Epistles & Philemon
Other Treatises, Homilies, & Writings

Letters of St. Jerome (4th / 5th centuries)

St. Augustine of Hippo (4th / 5th centuries)
Confessions On Christian Doctrine
Enchiridion on Faith, Hope, & Love City of God
On the Holy Trinity / Doctrinal Treatises / Moral Treatises

Rule of St. Benedict
Second Paschal Oration (St. Gregory of Nazianzen)

"Pastoral Care" by St. Gregory the Great (5th / 6th centuries)
Book One Book Two Book Three Book Four