This was a real tough one to find out. The local name of the temple is Sathyanadheshwara temple but the old name is Kaarikadu thirunatheeshwara. It has been sung about by Gnanasambandar and it is a Navagraha sthalam for Mercury(Budhan)
How to Reach:
The temple is situated in Vishnu Kanchi and to reach this temple first ask for the Kanchipuram GPO this is in the north east part of Chinna kanchipuram .Opposite to this is the Tirukallimedu road follow this road which parallels a huge drain /sewer and after 2 kms take a left turn and you will come in front of the temple
Legends and Stories:
Budhan (Mercury) prayed here for alleviation of his sins. His athi devathai is Vishnu hence there is a Vishnu and Budhan sannidhi here
When Sambandar came here it was a forest of thorn trees .
The Shiva Lingam is Red in Dakshinayanam and in Uttarayanam it is white in colour
The Goddess is Bhramarambika. The temple and the Sivalingam are both west facing hence the Kosta vigrahas are all reversed
The Sannidhi for Perumal also has Lakshmi inside
The Koshta vigrahas are seen below
Indra and Budhan worshiping Shiva
Perumal sannidhi