Gnana Oli (transl. Light of Knowledge) is a 1972 Indian Tamil language film, directed by P. Madhavan and written by Vietnam Veedu Sundaram, starring Sivaji Ganesan. It is a loose adaptation of Victor Hugo's 1862 novel Les Miserables. This film was remade in Hindi as Devata (1978) and in Telugu as Chakravarthy (1987).