Aryabhata) (476 – 550)is the first of the great mathematician-astronomers of the classical age of India. He lived in Kusumapura, which his commentator Bhaskara I (629 AD)( ? BCE ) identifies with Pataliputra (modern Patna).There is little doubt that till the advent of the 20th century he was one of the greatest astronomers of all time in human history. There is considerable uncertainty as to the antiquity of Aryabhata. There is evidence in his own works that he gives an accurate dating as to when he lived. Quoting from the book by Lakshmikantham and Leela (Origin of Mathematics)