Mūsā al-Khwārizmī A stamp issued September 6, 1983 in the Soviet Union , commemorating al-Khwārizmī's (approximate) 1200th birthday. Born c. 780 Died c. 850 Ethnicity Persian [ 1 ] [ 2 ] [ 3 ] Known for Treatises on algebra and Indian numerals Influenced Abu Kamil Abū ʿAbdallāh Muḥammad ibn Mūsā