Saint Albert the Great (c.1200-1280) was a Dominican friar, who served as Archbishop of the German city of Regensberg. Reputed to be the most learned man of his time, one of Albert's greatest distinctions is that he was the principal teacher of Saint Thomas Aquinas, the 'Angelic Doctor'. Albert's corpus of writings is vast and all-encompassing. A true polymath, he was an expert not only on theology, philosophy and Sacred Scripture, but also on chemistry, medicine, botany, zoology and astronomy. It is very appropriate, therefore, that he is known as the 'Doctor Universalis, ' or Universal Doctor. His feast day is November 15.