sekkilar lived reign kulothunga chola ii ce religious books vaishnava sect mostly composed sanskrit period great vaishnava leader ramanuja lived reigns athirajendra chola kulothunga chola face religious persecution cholas belonged saiva sect one best known tamil works period ''ramavatharam'' kamban flourished reign kulottunga iii ''ramavatharam'' greatest epic tamil literature although author states followed valmiki work
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