Early Church

Championing Nicene Orthodoxy, Battled Arianism, Wrote "On the Incarnation"

Systematizing monasticism in the East and Co-defending the Trinity, and the Divinity of the Spirit, the Main Cappadocian Father

Nicknamed the Theologian, famous for his deep trinitarian theology, especially the deity of the Holy Spirit

Developing Mystical theology and the concept of epektasis, the more speculative of the Cappadocians

wrote the Catechetical Lectures, a comprehensive early church instruction manual, bishop of jerusalem

He Baptised Augustine and stood up to emperor theodosius over Church authority, he was a big Latin Father

Known for Translating the Latin Vulgate and defending the Perpetual Virginity of Mary

Most influential western theologian, wrote confessions and The City of God

The Athanasius of the West, defending trinitarian doctrine against Arianism, and the first big Latin Father of Niece orthodoxy

Heresiologist, he wrote the Panarion defending orthodoxy against 80 heresies

Founder of Christian monasticism, subject of Athanasius's biography