Systematic Theology: The Doctrine of God

The complete Summa Theologica by Thomas Aquinas covering the nature of God, the Trinity, creation, morality, and the sacraments. One of the most influential works in Western theology and philosophy.

Saint Thomas Aquinas

Calvin's magnum opus in four books: Knowledge of God the Creator, Knowledge of the Redeemer, Grace of Christ, and the Holy Catholic Church. Translated by Henry Beveridge (CCEL edition).

John Calvin

A complete systematic theology textbook covering all major doctrines from prolegomena to eschatology. Used in seminaries worldwide for nearly a century, this Reformed classic by Louis Berkhof remains a standard reference.

Louis Berkhof

Volume I of Charles Hodge's three-volume systematic theology covering theological method, the nature and attributes of God, and the Trinity. A foundational work of Princeton Reformed theology from the 19th century.

Charles Hodge

Volume I of Strong's comprehensive systematic theology covering theology proper, the existence of God, Scripture, and the nature of divine attributes. A major Baptist contribution to systematic theology with philosophical rigor.

Augustus Hopkins Strong