Tirukoilur or Tirukkoyilur also called Thirukkovalur or Kovalur. is a panchayat town in Viluppuram district in the Indian state of Tamil Nadu. As the name says "koil" (means temple in Tamil language) it is famous for the temples. It is also spelled as Thirukkovilur or Thirukkoiloor situated on the banks of Pennar river. The Veerataneshwara Shiva temple at East Thirukoilur and Ulagalantha Perumal temple, at west Tirukoyilur are located in this town. It was once a ruling city called Miladu Naadu or Malai Nadu ruled by the powerful king Malaiyamān Thirumudi Kāri of Malayaman dynasty, he is considered one of the seven greatest "Bestowers" of the last Sangam era. It was later succeeded by early chola king Killivalavan.