The Naganatha Swamy Temple or Kethu Sthalam is a Hindu temple in the village of Keelaperumpallam, 2 kilometres from Poompuhar. The presiding deity is Ketu, a shadow planet. However, the main idol in the temple is that of Naganatha Swamy or Shiva. The temple has a flat rajagopuram surrounded by two prakaram (closed precincts of a temple). The temple has four daily rituals at various times from 6:00 a.m. to 8:30 p.m., and four yearly festivals on its calendar. Mahasivarathri, Margazhi Thiruvadirai, Panguni Uthiram and Thirukartigai are the major festivals celebrated in the temple. The village finds cursory mention in the 7th-century Tamil Saiva canonical work, the Tevaram, written by Tamil saint poets known as the Nayanars and classified as Vaippu Sthalam. The original complex is believed to have been built by Cholas, while the present masonry structure was built during the Nayak during the 16th century. In modern times, the temple is maintained and administered by the Hindu Religious and Charitable Endowments Department of the Government of Tamil Nadu. The temple is one of the nine Navagraha temples of Tamil Nadu and is a part of the popular Navagraha pilgrimage in the state - it houses the image of Ketu. Legend As per Hindu legend, to obtain Amrita – the nectar of immortal life, the Ocean of Milk was churned. At the suggestion of Vishnu, the devas and asuras churn the primeval ocean in order to obtain Amrita which will guarantee them immortality. To churn the ocean they used the Serpent, Vasuki, for their churning-string. For a churning pole they used Mount Mandara placed on the back of a Great Tortoise – the Kurma Avatar of Vishnu. As the gods and demons churned the sea, the terrible poison Halahala issued from its depths and began to envelop the universe with its choking fumes. The devas went to Shiva for rescue who drank the poison the neutralize it. Vasuki was very upset that her mistake resulted in the issue. She prayed to Shiva to propitiate her sins. Shiva was pleased with her devotion and appeared as Naganathar in this place. Architecture The temple is located in Keelaperumpallam, a village located from Poompuhar and from Thanjavur on the Thanjavur - Poompuhar road. The temple has a recently built flat rajagopuram surrounded by single prakaram, closed precincts of the temple. The place is revered by the verses of Appar, but since there