Eusebius is best remembered for his celebrated Ecclesiastical History, which provides a history of Christianity from the apostolic age down to the early fourth century. It is primarily this work that earned Eusebius the title of Father of Church History. Eusebius was born in Palestine about A. D. 264. Beginning about 315, he was made bishop of Caesarea. His Praeparatio Evanglica contains valuable extracts from the ancient philosophers. His Chronica is likewise valuable to students of ancient history. Theologically, Eusebius is remembered for his retelling of Christian history to include a positive role for the admired Roman emperors as instruments of God's will. Eusebius died about 340.
Andrew Louth is professor emeritus of patristic and Byzantine studies at Durham University, England, and visiting professor of Eastern Orthodox theology at the Amsterdam Centre of Eastern Orthodox Theology (ACEOT), in the Faculty of Theology, the Free University, Amsterdam. He is also a priest of the Russian Orthodox Diocese of Sourozh (Moscow Patriarchate), serving the parish in Durham. His recent publications include Introducing Eastern Orthodox Theology (SPCK), Greek East and Latin West, AD 681-1071 (St Vladimir's Seminary Press), Maximus the Confessor (Routledge) and The Origins of the Christian Mystical Tradition (OUP).