Abstract

The year 1249 marked a turning point in the intellectual career of Albert the Great. This was the year he finally acceded to the pleas of his Dominican confreres to compose a work explaining the natural science of Aristotle. The immediate product of this decision was Albert’s paraphrastic commentary on the Physics, but there were long-term results as well. This work was but the first part of what was to become one of the major literary productions of the Middle Ages; a production which would establish Albert as, according to his envious contemporary Roger Bacon, an auctoritas on equal footing with Avicenna, Averroes, and Aristotle himself. Albert’s project, intended to “make the new learning of Aristotle intelligible to the Latins,” was largely concerned with the natural sciences. He not only commented extensively on all of Aristotle’s libri naturales but also recorded his own extensive researches in several fields. By far the largest part of this vast compilation of the sciences is that devoted to zoology. Albert’s massive De animalibus libri XXVI is not only the longest of his Aristotelian commentaries but also represents one of the most extensive records of empirical observation published before modern times.