https://en.wikipedia.org/wiki/List_of_Hindu_temples_in_Tamil_Nadu
https://timesofindia.indiatimes.com/travel/web-stories/10-oldest-temples-to-visit-in-tamil-nadu/photostory/110701067.cms
https://hiramprakash.wordpress.com/ 276 siva
https://www.tamilvu.org/library/nationalized/pdf/53-paramasivanantham/004.ancienttemplesoftamilnadu.pdf