Zu Chongzhi (simplified Chinese: 祖冲之; traditional Chinese: 祖沖之; pinyin: Zǔ Chōngzhī; Wade–Giles: Tsu Ch'ung-chih) (429–500), courtesy name Wenyuan (文遠), was a prominent Chinese mathematician and astronomer during the Liu Song and Southern Qi Dynasties.
Read more about Zu Chongzhi: Life and Works, Astronomy, Mathematics, The South Pointing Chariot, Named For Him