Those discovering the growing number of writings on the religious history of the Federal Republic of Germany might be forgiven for thinking that they had entered a parallel universe. To use the terminology popularized by M. Rainer Lepsius, Christian milieus have largely disintegrated and their members been integrated into the mainstream of political and economic life. Yet until recently, research on German Catholicism and Protestantism has remained confined to confessional ghettos that many members of these religious subcultures once sought to escape. The dozens of monographs that have appeared in the last five years have yet to be incorporated into the central narratives that dominate the secular histories of the postwar era. Many have still to be reviewed in non-religious journals. Edited volumes that purport to analyze the many facets of the Federal Republic include few if any chapters on religion.