After a hundred years of political turmoil, civil war, and invasion, the Roman Empire that Diocletian inherited in AD 284 desperately needed the radical restructuring he gave its government and defenses. His successor, Constantine, continued the revolution by adopting a vibrant new religion : Christianity. The fourth century is an era of wide cultural diversity, represented by figures as different as Julian the Apostate and St. Augustine. Averil Cameron provides a vivid narrative of its events and explores central questions about the economy, social structure, urban life, and cultural multiplicity of the extended empire. Examining the transformation of the Roman world into a Christian culture, she takes note of the competition between Christianity and Neoplatonism. And she paints a lively picture of the new imperial city of Constantinople.