Qotb al-Din Mahmoud b. Zia al-Din Mas'ud b. Mosleh Shirazi (Persian : قطب‌الدینْ محمود بن ضیاءالدینْ مسعود بن مصلح شیرازی ; 1236–1311) was a 13th-century Persian polymath and poet who made contributions to astronomy, mathematics, medicine, physics, music theory, philosophy and Sufism.