Der alte und neue Glaube, The Old and New Faith, publ. 1872. Born in 1808, appointed professor at the University of Zurich, Strauss became a center of controversy, the intensity of which has been likened to that of the Thirty Year's War. This began with the appearance of his Life of Jesus (1835), in which he questioned the sources of the New Testament, and continued with his Doctrine of the Christian Faith (1840). From this time until his death in 1874, Strauss became world-famous as one of the most frank critics of Christianity.