Thiruvenkadu Temple – Mercury (Budha)

The temple is known as Swetharanyeswarar Temple, located in the village of Thiruvenkadu (also spelled Thiruvengadu) in Mayiladuthurai / Nagapattinam district, Tamil Nadu, India.
It is one of the Navagraha temples of Tamil Nadu — specifically dedicated to Budha (Mercury) among the nine planets

“वैथीश्वरन कोविल – जहाँ भगवान शिव वैद्य बनकर रोगों को हर लेते हैं।”

― Thiruvenkadu Temple – Mercury (Budha)

The main deity is Lord Shiva in the form Swetharanyeswarar (“Lord of the White Forest”). His consort is called Brahma Vidya Ambal.

Mythological Significance & History

The temple is an ancient one, with inscriptions and structural contributions from Chola kings such as Aditya Chola I, Raja Raja Chola I, and later rulers.
The legend says that Budha (Mercury) had some ailment/dosha due to his origin and sought relief through penance to Lord Shiva here. Shiva, pleased with his devotion, relieved him of his dosha, hence the place becoming famous as a remedy for Mercurial afflictions.
The name Thiruvenkadu comes from “Thiru” + “Ven” + “Kaadu.” “Ven” or “Swetha” means “white,” and “Kaadu” means “forest” — so “holy white forest.” This refers to the temple’s ancient surroundings.

Significance of the Temple

It is considered a Budha Sthalam — devotees believe worship here helps with issues related to education, communication, intellect, speech, business matters, etc., all governed by Mercury.
Remedies for Budha Dosha (Mercury malefic effects) are performed here: special poojas, offerings, lighting lamps, etc.
There are three sacred water bodies (theerthams) in the temple: Surya Theertham, Chandra Theertham, and Agni Theertham. Bathing in them is believed to cleanse sins, heal, and remove delays in marriage and other life difficulties.
The temple also has a special form of Lord Shiva called Agora Murthi, and other aspects where Shiva is worshipped in fierce / cosmic forms.