Writer on philosophy, theology, and mysticism, born probably in Saxony, 1096; died 1141. He was the eldest son of Conrad, Count of Blankenburg. In 1133 he became head of the School of Saint Victor, Paris, which under him acquired great celebrity. His writings cover the whole range of the arts and sacred science of his age. After synthesizing the dogmatic teachings of the Fathers, he systematized them into a coherent body of doctrine, influencing the whole development of Scholasticism, of which he is a founder. He was no less remarkable as leader of the great mystical movement of which Saint Victor's was the center.