This reference work serves as the definitive encyclopedic resource for the history, theology, and institutional development of the Christian Church. Edited by Professor Andrew Louth, this comprehensive dictionary synthesizes centuries of ecclesiastical scholarship into a structured, accessible format. It provides detailed entries on figures, movements, doctrines, and historical events that have shaped the Christian tradition from its inception to the modern era.

Scholars and students of theology consistently identify this dictionary as a foundational reference tool for academic research. Readers frequently note the high density of the prose and the rigorous editorial standards maintained across both volumes.