Born into a family of physicians in Shīrāz (where he remained until age 24), he studied first with his father Ḍiyā’ al-Dīn al-Kāzarūnī at the then new Muẓaffarī Hospital, then after his father died when he was 14, he continued his studies, with an uncle, also a physician, and  2 prominent teachers, Shams al-Dīn Kīshī and Sharaf al-Dīn Būshkānī. These studies included the “General Principles” of Ibn Sīnā’s Canon of Medicine as well as Sufi mysticism. At Marāgha his most prominent teacher was Naṣīr al-Dīn al-Ṭūsī but he also studied with Najm al-Dīn al-Kātibī and `Urḍī. Sometime after leaving Marāgha, he traveled to Anatolia and studied in Konya, and was appointed chief judge in Malaṭya and Siwās. Circa 1290, Shīrāzī retired to Tabrīz.; Students included: Kamāl al-Dīn al-Fārisī (d. 1320), known for his work on optics (Tanqīḥ al-manāẓir), and Niẓām al-Dīn al-Nīsābūrī (d. 1329/30), a Qur’ān commentator and astronomer. Shīrāzī wrote 3 major works in theoretical astronomy: the Nihāyat al-idrāk fī dirāyat al-aflāk (The highest attainment in comprehending the orbs; completed 1281); al-Tuḥfa al-shāhiyya (The imperial gift; completed 1285); and Fa`alta fa-lā talum (You’ve done it so don’t blame [me]), a supercommentary on the Tadhkira fī `ilm al-hay’a by Ṭūsī. [Ragep]