Michael of Ephesus, who completed his commentaries in or after 1138, was one of the principal Aristotelian scholars in a group organized in Constantinople by the Empress Anna Komnena. His commentary was translated into Latin by Domenico Montesauro, a physician of Verona. In the present edition Michael's work is followed (pp. 201-325) by a version in Latin of book I of the original Aristotle, with facing commentary, by the Padua philosophy professor Niccolo Leonico Tomeo (1456-1531). Digital facsimile from the Bayerische Staatsbibliothek at this link.