Biddashagor 26 September 1820 – 29 July 1890), born Ishwar Chandra Bandopadhyaya ( Bengali : ????? ?????? ???????????????, Ishshor Chôndro Bôndopaddhae ), was an Indian Bengali polymath and a key figure of the bengal renaissance . [1] [2] Vidyasagar was a philosopher , academic, educator , writer, translator, printer, publisher, entrepreneur,