The art in medieval cathedrals, in addition to its profound aesthetic appeal, told unlettered churchgoers a series of morality tales. From divine creation to the lives of the saints, the stone sculpture and stained glass windows provided dramatic illustrations of the key elements of Christian doctrine. Unfortunately, the true meaning of these religious artworks was gradually obscured by time. In 1913, however, this brilliant study appeared, clarifying and illuminating the original ideas and concepts behind the sacred art of the Middle Ages.