The School of Chartres was a bold intellectual movement of the twelfth century that introduced the World Soul and the Chartrian cosmology to Christendom. In his controversial book, The Sacred Cosmos, theologian Peter Ellard analyzes the most radical aspects of Chartrian thought and traces their relation to classical and late-antique philosophers such as Boethius and Plato. In addition, Ellard investigates the Cathedral of Chartres as an important proof and example of Chartrian theology in this essential volume for anyone interested in the intersection of spirituality and philosophy.