The story of King Arthur and the Grail still holds a remarkable fascination for many people. In this classic work, Walter Johannes Stein traces its origins in early Christianity and classical and Nordic mythology, and follows its development in medieval and modern times. In particular Stein explores the parallels between the quest for the Grail and the medieval alchemists' search for the Philosopher's Stone. This book is a collection of essays that were first published, or delivered as lectures, in the 1920s and 1930s. The first section of the book is Stein's own memoirs, which ground his research in the cultural background of the era.