St. Albert the Great Bollst鋎t; said Doctor Universalis; also known as Albert the Great; Albert of Cologne (1206 - 1280); Catholic bishop; German philosopher and scientist. It is regarded as the greatest German philosopher and theologian of the Middle Ages; both for his great erudition and for his commitment to philosophical logic level to reconcile faith and reason; applying Aristotle's philosophy to Christian thought. Was the teacher of St. Thomas Aquinas. The Catholic Church venerates him as the patron saint of scientists and Doctor of the Church. Commemoration November 15. Colored print of the eighteenth century German