Information on Christian theologians of the Middle Ages, including Byzantine theology and Renaissance humanism. For the West, this includes theologians after Gregory the Great (d. 604) but before the Reformation. For the Christian East, the Byzantine period begins with theologians after John Damascene (d. circa 750).

The "Modern Theologians" category presents biographies and selected works from the great theologians of the modern era. This category is limited to those theologians whose completed life's work has contributed widely to religious thought, and who have won critical acclaim from both the professional academic community and the public at large.