Muḥammad ibn Muḥammad ibn al-Ḥasan al-Ṭūsī, commonly known as Naṣīr al-Dīn al-Ṭūsī 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. February 24, 1201 – July 2, 1274; died at 73. Alive at the same time as Marco Polo, Genghis Khan, Thomas Aquinas, Rumi, and Francis of Assisi. Wiki link