Nasir al-Din al-Tusi

Persian astronomer (1201–1274)

Muḥammad ibn Muḥammad ibn al-Ḥasan al-Ṭūsī (1201–1274; AH 598–673), commonly known as Naṣīr al-Dīn al-Ṭūsī (Arabic: نصیر الدین الطوسی; Persian: نصیر الدین طوسی) or simply (al-)Tusi, was a Persian polymath, architect, philosopher, physician, scientist, and theologian, as well as a prominent Shiʿite scholar. He wrote extensively on mathematics, engineering, prose, mysticism, philosophy, theology, and the sciences, and is widely regarded as one of the greatest scientists of medieval Islam. Born in Ṭūs, from which his name derives, al-Tusi later worked under an Ismāʿīlī ruler at Alamūt, the centre of the Nizārī Ismāʿīlīs, and produced Ismāʿīlī works that acquired considerable authority, although his own personal religious allegiance during this period remains uncertain.

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