The Cambridge Companion to the Byzantine Church explores the intricate dimensions of the Church in Byzantium-its emergence, theology, art, liturgy and histories-and its afterlife, in captivity and in the modern world. Thirty leading theologians and historians of eastern Rome examine how people from Greece to Russia lived out their faith in liturgies, veneration of the saints, and other dimensions of church life, including its iconic art and architecture. The authors provide a rich overview and insights from the latest scholarship on the lives and beliefs of emperors and subjects across the Byzantine empire. The volume thereby fills a prominent gap in current offerings on the development and continuing impacts of the Byzantine church from the fourth to fifteenth centuries, and will serve as a valuable resource for scholars, a companion for students and an introduction for the wider community to this fascinating chapter in the history of Christianity.