Eusebius' Ecclesiastical History, written in the early fourth century, continues to serve as our primary gateway to a crucial three hundred year period: the rise of early Christianity under the Roman Empire. In this volume, James Corke-Webster undertakes the first systematic study considering the History in the light of its fourth-century circumstances as well as its author's personal history, intellectual commitments, and literary abilities. He argues that the Ecclesiastical History is not simply an attempt to record the past history of Christianity, but a sophisticated mission statement that uses events and individuals from that past to mould a new vision of Christianity tailored to Eusebius' fourth-century context. He presents elite Graeco-Roman Christians with a picture of their faith that smooths off its rough edges and misrepresents its size, extent, nature, and relationship to Rome. Ultimately, Eusebius suggests that Christianity was - and always had been - the Empire's natural heir.