The eighteen papers collected in this volume - fifteen of which are published in English for the first time - explore the transformations of religious practices between the third and the fifth centuries in the Western part of the Roman Empire. They share an approach that privileges the study of processes and interactions and does not take for granted the categories and roles traditionally ascribed to social actors. A first group of papers focuses on the sermons and letters of Augustine of Hippo. These texts are precious evidence for balancing the clerical perspective that characterizes most of our sources and can thus shed a different light on the problem of Christianization. The second group collects papers that propose to shift attention from the construction of heresies to that of orthodoxy through the case-study of the controversy of Augustine against Pelagius and Julian of Eclanum. A last group present studies that look at the complex relation between burial and religion, with a particular focus on the role played by the church in the organization of the burial of Christians in Late Antiquity.