Theologically and historically, the theme of Christian authority is of great significance. These papers, presented in honor of the great scholar Henry Chadwick, balance contributions from Roman Catholic and Anglican theologians on such topics as ecclesial communion, the reception of Vatican II among non-Catholics, the Book of Genesis and the origin of evil in Jewish and Christian tradition, revelation in early Christianity, William Thorpe, the Lutheran forma ecclesiae in the 1530 Augsburg Colloquy, the authority of Chalcedon, the Coronation of Louis XVI, and Dollinger and reunion.