 The Metaphysics held an undisputable importance for the school of Christian Aristotelians that flourished in Baghdad during the X–XI centuries, who took over from the Aristotelian scholars of Alexandria the project of providing a systematic commentary on Aristotle’s works. Many members of this school—starting from its founder, Abū Bišr Mattā ibn Yūnus (d. 940), through to its later leader, Abū Zakariyāʾ Yaḥyā Ibn ʿAdī (d. 974), and to one of its last representatives, ʿĪsā ibn Zurʿa (d. 1008)—contributed decisively to the translation of the Metaphysics into Arabic. Moreover, some of these authors are credited with the translation into Arabic of parts of the main Greek commentaries on the Metaphysics (Alexander of Aphrodisias and Themistius on book Lambda, by Abū Bišr Mattā), or they were reported to be familiar with the Arabic translation of further Greek commentaries on Aristotle’s work, as well as with treatises on metaphysics by some of Aristotle’s immediate disciples (for example, Yaḥyā Ibn ʿAdī was said to be familiar with the commentary on book Beta by Syrianus and the original treatise on metaphysics by Theophrastus of Eresus). Finally, numerous literal commentaries on the Metaphysics, following in the footsteps of Alexander of Aphrodisias’ exegetical style, were produced within the school. Thus, later sources inform us that Abū Bišr Mattā commented on books Alpha Elatton, Βeta (III) and Theta (VIII) of the Metaphysics; he is also quoted in Avicenna’s exegesis of book Lambda (XII). Yaḥyā Ibn ʿAdī’s commentary on book Alpha Elatton is extant. Abū l-Faraǧ ibn al-Ṭayyib’s (d. 1043) commentary on the Metaphysics, preserved in fragments in Hebrew translation, is famous for its length and its extremely detailed character, an exegetical style decidedly resented by Avicenna.