Albertus Magnus (1200–1280) was a German Dominican theologian who was also a dedicated scholar of philosophy. As master of theology at the University of Paris, he was a member of the commission that condemned the Jewish holy book, the Talmud. His philosophical contributions consisted mainly of Aristotelian commentaries; and where Aristotle disagreed with Catholic doctrine, Magnus corrected him and substituted different accounts. He relied on astrology in his view of the physical world, believing, for instance, that when the influence of Jupiter and Saturn increased the result was great fire, whereas when this influence decreased, there would be floods.