Muḥammad ibn Muḥammad ibn al-Ḥasan al-Ṭūsī (1201 – 1274),[a] also known as Naṣīr al-Dīn al-Ṭūsī[5] (Arabic: نصیر الدین الطوسی; Persian: نصیر الدین طوسی) or simply as (al-)Tusi, was a Persian polymath, architect, philosopher, physician, scientist, and theologian.