Michael of Ephesus

Michael of Ephesus or Michael Ephesius (Greek: Μιχαήλ Ἐφέσιος; fl. early or mid-12th century AD) wrote important commentaries on Aristotle, including the first full commentary on the Sophistical Refutations, which established the regular study of that text.[1]

Michael of Ephesus
NationalityByzantine Greek
Scientific career
InstitutionsUniversity of Constantinople
Doctoral advisorEustratius of Nicaea


Little is known about Michael's life. He worked in the philosophy college, of the University of Constantinople. Together with Eustratius of Nicaea, he was part of a circle organized by Anna Comnena.[2] As Michael suggests at the end of his Parva Naturalia commentary, his goal was to provide coverage of texts in the Corpus Aristotelicum that had been neglected by earlier commentators;[3] this was "part of a cooperative scholarly undertaking conceived and guided by Anna Comnena."[4]

The fanciful suggestion that the Aristotelian commentator was none other than Michael VII Doukas, making good on his tuition under Michael Psellos (who was apparently not Michael of Ephesus' teacher) and turning after his abdication to scholarship as the archbishop of Ephesus, is no longer taken seriously.


Michael's breadth is remarkable, and his interpretive method has been compared to that of Alexander of Aphrodisias; the commentary on Metaphysics Books 7-14 attributed to Alexander is considered to be his work.[5] Michael's commentaries draw on Neoplatonist ideas and on the exegetical tradition of Stephen of Alexandria. At times they allude to contemporary Byzantine matters and include criticism of the emperor and of the current state of education.

The commentaries: Greek textsEdit

Latin translationsEdit

James of Venice may have collected texts from Michael's workshop for translation into Latin.[2] The composite collection of commentaries including Michael's commentaries on the Nicomachean Ethics was translated into Latin by Robert Grosseteste, and again by Giovanni Bernardo Feliciano (Venice 1541).[6]

English translationsEdit

  • Aristotle and Michael of Ephesus on the Movement and Progression of Animals, trans. Anthony Preus, Hildesheim: Georg Olms, 1981
  • Aspasius, Anonymous, Michael of Ephesus, On Aristotle: Nicomachean Ethics 8 and 9, trans. David Konstan, Duckworth, 2001
  • Michael of Ephesus, On Aristotle: Nicomachean Ethics 10, trans. James Wilberding and Julia Trompeter, Bloomsbury Academic, 2019


  1. ^ A.C. Lloyd, review of S. Ebbesen, Commentators and commentaries on Aristotle's Sophistici elenchi (Leiden: Brill, 1981), Journal of Hellenic Studies 106 (1986), pp. 231-233
  2. ^ a b Richard Sorabji, "Aristotle Commentators," Routledge Encyclopedia of Philosophy, 1998, 2002
  3. ^ CAG XXII.1 p. 149, cited by Hans B. Gottschalk, "The Earliest Aristotelian Commentators," in Sorabji (ed.), Aristotle Transformed (Ithaca: Cornell University Press, 1990), p. 68 n. 67
  4. ^ R. Browning, "An Unpublished Funeral Oration on Anna Comnena," Proceedings of the Cambridge Philological Society n.s. 8 (1962)
  5. ^ a b Katerina Ierodiakonou and Börje Bydén, "Byzantine Philosophy," Stanford Encyclopedia of Philosophy, 2008
  6. ^ H.P.F. Mercken, "The Greek Commentators on Aristotle's Ethics," in Sorabji (ed.), Aristotle Transformed, pp. 407-410