These nine essays, written by leading experts in the field, focus on the production and application of canon law at the local level. This broad themepermits many subjects to be explored: canonical collections produced in a particular locale by key figures in that area; local manuscript copies ofwidespread texts; administrative usages and canonical rules for churches within a certain area; specific synodal decrees important to regional ecclesiastical activity and governance; and the reception and adaptation of canonical norms and rules in a particular diocese or other venue. These studies collectively deepen our appreciation of the importance of canon law for people in their home churches and regions. They help us understand canon law in its decentralized, non-papally administered forms, across the full temporal range of the Middle Ages. The special value of these works lies in illuminating the pragmatic role of particular circumstances in adapting the church’s tradition in order to be relevant and to meet local needs.