The presiding deity is housed in the east facing central shrine located axial to the gateway tower. The sanctum (garbhagriha) has a square plan with a dimension of and is surmounted by a dvitala vimana (pyramidal roof), an all stone structure. The pyramidal roof is interspersed with niches with tetragonal semi-pilasters. The corner bays have octagonal bases, while the central bays having circular ones. The two circular pilasters with circular shafts on four sides of the vimana indicates the antiquity of the temple. The feature is possibly termed Vrittasputitas in silpa texts like Shilparatna. Such a feature is otherwise found only in few other temples like Tiruttalinathar Temple in Thiruputhur, central shrine in Moovar Koil in Kodumbalur, Vijayalaya Choleeswaram in Narthamalai, Anantheswara temple in Udayarkudi and Kampaheswarar Temple, Thirubuvanam. In the first level of the vimana, there are niches of Dakshinamurthy in the south, a seated four-armed Vishnu in the west and a seated four-armed Brahma in the north. There are a number of old images like Sattanatha, Devakosha on the vimana. The niches of the karnakutas of the first tala contains images of a kneeling man on the left and a kneeling lady in the right. Such a feature is otherwise found in Dandeeswarar Temple in Velachery and Vadathirthesvarar Temple, Andanallur in Tiruchendurai.
