What are the sacraments? For centuries, this question has elicited a lively discussion and among theologians, and a variety of answers that do anything but outline a unified belief concerning these fundamental ritual structures. In this volume, a group of renowned scholars map the theologies of sacraments offered by key Christian figures from the Early Church through the 21st century. Together, they provide a guide to the variety of views about sacraments found throughout Christianity, showcasing the variety of approaches to understanding the sacraments across the Catholic, Protestant, and Orthodox faith traditions.