This temple is located at about 15 Kms from Chennai Central railway station and about 1 Km from Tiruvanmiyur Bus Terminus. It is believed to be built in the 7th century A.D. during the Chola period. The presiding male deity is Lord Shiva known as Marundeeswarar (Lord of Medicines) manifests Himself in the form of Swayambu Lingam. His divine consort is known as Thiripurasundari. According to legend, Lord Shiva is said to have given relief from health problems to the great sage Agasthiyar, the Sun God and the Moon God. It was Sage Agasthiyar who named the deity as Marundeeswarar. Unlike in other Shiva temples, there is no separate shrine for Navagrahas here becaue of the Sun and Moon who are in the prayer mood here. There are shrines for Lord Vinayakar and Lord Subramanya and also to Sage Valmiki. It is said that God Shiva gave Darshan to Sage Valmiki in a dancing pose beneath the west tower of the temple. Saints Tirunavukkarasar and Thirugnanasambandar, who lived in the 7th century, have composed numerous hymns on their visits to this temple. It is one of the oldest shrines in Chennai city dating back to Chola and Pallava period.