This is a list of Monuments of National Importance (ASI) as officially recognized by and available through the website of the Archaeological Survey of India for the Chennai Circle in the Indian state of Tamil Nadu. The Circle has a total of 250 Monuments and Sites of National Importance.
https://bhuvan-app1.nrsc.gov.in/culture_monuments/ <br> https://asichennai.gov.in/downloads/MTS_EXTENT.pdf <br> https://asichennai.gov.in/downloads/SITE_EXTENT.pdf <br> https://sansad.in/getFile/annex/253/AU1636.pdf?source=pqars