The sanctum at the lower level houses the image of Chaturbhujanga Vishnu sported with four arms. Two of his hands hold the conch and chakra, while the third is depicted with Abhaya hasta (guarding sign) and the fourth with kati hasta (resting on thigh). The image is depicted in standing posture and commonly called as the Sundaravarada Perumal. The sanctum also houses the images of Sridevi and Bhudevi on either sides of Sundaravarada. The festival image of Sundaravarada is also housed in the same sanctum. The walls around the sanctum have panels in each direction that house the images of Achyutha Varada (facing South), Anirudda Varadha (facing West) and Kalyana Varada (facing North), who are believed to have offered relief to Arjuna, Nakula and Sahadeva. The first tier is approached by a flight of steps on either side, usually one is used for ascending and other for descent. The sanctum first tier houses the image of Vaikuntavarada in seated posture with Sridevi and Bhudevi on either of his sides. The sanctum is made of wood and has a narrow precinct around the sanctum. There are shrines of Arjuna, Krishna and Yoga Narasimha around the sanctum. Another set of steps leads to the top floor leading to the sanctum of Ananda Padmanabha in reclining posture in his serpent bed of Adisesha. The images of Bhudevi and sage Markendeya are seen in the sanctum. The roof of the sanctum is called Padma Kosthta Ashtanga Vimana, which has sculptural depiction of the nine different forms of Vishnu.