In this sweeping account, Aidan Nichols, O.P., brings to life the theological achievements of 18 Church Fathers from both the Greek East and Latin West. From Irenaeus to Bede the Venerable, Nichols weaves a rich tapestry of biographical detail and theological insight, revealing the complex and profound ideas that shaped Christian thought across the centuries. With passion and conviction, he introduces readers to the figures who have been most authoritative for Catholic doctrine and influential in Church life, offering a holistic and loving introduction to the masters of Christian theology.