Naganathaswamy Temple, Thirunageswaram

Naganathaswamy Temple, in Thirunageswaram village a few kilometers from Kumbakonam, is the Navagraha shrine for Rahu, the lunar north node, and is recorded as the 29th of the Tevara Sthalams south of the Kaveri river in the 7th-century Tevaram canon. Shiva is worshipped here as Naganathar, “Lord of Serpents,” a name devotional tradition connects to the serpent deities Adishesha and Karkotaka and to sages such as Gautama Maharishi and Bhagiratha, all said to have worshipped at the site. The village is also home to the separate and independently significant Vaishnavite shrine of Oppiliappan Koil, one of the 108 Divya Desams, already documented elsewhere in this directory; the two temples, though close together, are distinct establishments.

What sets Thirunageswaram apart within the Navagraha circuit is its Rahu shrine, where Rahu is depicted with consorts rather than in the plain coiled-serpent form typical of his images elsewhere, and where a daily milk abhishekam is performed during Rahu Kaalam, an astrologically inauspicious period that shifts with the day of the week. Devotees and published accounts alike describe an unusual visual effect during this ritual: the milk appears to turn blue as it flows over the idol’s body before reverting to white once it reaches the floor, a phenomenon devotees regard as a sign of the shrine’s particular potency and one reported as unique among Tamil Nadu’s Navagraha temples. No source consulted established a specific founding century for the Naganathar temple itself, so this entry does not assign one.