Between Orders and Heresy foregrounds the dynamic, creative, and diverse late medieval religious landscapes that flourished within the spaces of social and ecclesiastical structures. This collection reconsiders the arguments put forward in Herbert Grundmann’s monumental book, Religious Movements in the Middle Ages, and challenges his traditional interpretive binary, recognized as the shared origins of many medieval religious movements. The contributors explore the social relationships fostered between secular clergy members, including parish priests, local canons, and aristocratic confessors, and examine the ways in which laypeople inspired and engaged in devotion beyond religious orders. Each essay in the volume considers a major theme in medieval religious history, such as the implementation of apostolic ideals, pastoral relationships, crusade connections, vernacular traditions, and reform. Organized to historicize and challenge the deeply embedded historiographical tendencies that have long distorted the complex dynamics of the late medieval world, Between Orders and Heresy is a major assessment of medieval religious belief and activity beyond and between the binary of orders and heresies