I had the opportunity to visit this ancient temple on 11/06/16 .though I could not find many references to this temple it appears very ancient and is definitely the underdog temple hugely overshadowed by the more famous Sri Bhuvaraha swami temple. The Shiva temple is situated at the back of the more famous Bhuvarahaswamy temple in Srimushnam and very few visit this temple.The priest had finished the first kala puja and left when I visited hence the temple garba gruha was locked but I did get a good darshan and lot of serenity during the visit.
Nearby there is the Uttaradhi mutt with Raghavendra swami Brindavanam also.The temple tank and the Sthalavruksham of the Bhuvarahaswami are both in front of the Shiva temple.both The Shiva and Ambal Brihannayaki are found having separate sannidhi with Nandi too in front and both are facing east
How to Reach:
Srimushnam can be reached either from Vriddhachalam ( approx. 20 kms)proceeding south towards Andimadam where in you take a left about 20 kms before andimadam after crossing Rajendrapattinam. You cam also travel from Kumbakonam( approx. 67 kms), Gangaikonda cholapuram /Jayamkondan to Srimushnam.( Recently I have travelled along all these roads and they are in excellent condition as of June 2016)
The koshta vigrahas were all unique but many were mutilated too Ganesha, UmaMaheshwara and Agasthya
On the northern side is the complex of Devi Brihannayaki Ambal. it is a separate temple by itself and was serenity personified. The Goddess is about5 feet tall and standing unfortunately I was too far away to get a better darshan
Clearly an ancient temple which has had its glorious times today sadly needs more patronage