To the north of the north entrance to the enclosure is a solitary shrine known as the Iruve Brahmadeva temple consisting only of a garbhagriha enshrining a low relief figure of Brahmadeva. The inscription on the doorway of this temple ascribes it to about 950 A.D.
If lot of iruve (ants) are found at home then people offer special prayers to the Brahmadeva here. Further, after offering prayers it is observed that the ants in the homes will be reduced. Hence the name Iruve Brahmadeva.