Tenkasi is built around the Kasi Viswanathar temple. The temple has a seven-tiered gopuram (temple tower) and has concentric granite walls that enshrines all the shrines in the temple. The temple has a pillared hall from the entrance leading to the flagstaff hall. The sanctum is located axial to the entrance facing east. The image of Kasi Viswanathar in the form of lingam is housed in the sanctum. The images of Vinayaka and Subramanya are located on either side of the hall leading to the sanctum. The shrine of Sivakami is located parallel to the sanctum facing East. There are smaller shrines of Dakshinamurthy, Arumugar, Durga, Navagrahas and Nataraja in the precinct around the shrines of Kasi Viswanatha and Visalakshi. The composite columns of Virabhadra holding sword and horn are found be additions of the Vijayanayagara kings during the early 1500s. Similar columns of Virabhadra are found in Adikesava Perumal Temple at Thiruvattaru, Meenakshi Temple at Madurai, Nellaiappar Temple at Tirunelveli, Krishnapuram Venkatachalapathy temple, Ramanathaswamy Temple at Rameswaram, Soundararajaperumal temple at Thadikombu, Srivilliputhur Andal temple, Srivaikuntanathan Permual temple at Srivaikuntam, Avudayarkovil, Vaishnava Nambi and Thirukurungudivalli Nachiar temple at Thirukkurungudi.