This collected volume contains 25 essays by the Church historian Ekkehard Mühlenberg. They focus on the Age of Late Antiquity. The substantive focus is provided by discussions between philosophy and theology in the struggle for a comprehensive understanding of reality. A significant contribution to research is also provided by reflections on the methodology of Church history. The essays are presented under categories such as “What is Church History?”, “The Notion of God in Philosophy and Theology”, “The Language of Religious Experience and Leading a Christian Life”.