A short walk southwest of Wat Mahathat, Wat Si Sawai was originally built by the Khmers as a shrine to Vishnu, Siva and other Hindu gods. Architecturally it resembles other regional Khmer monuments such as those at Phimai in northeast Thailand and Angkor in Cambodia.
During the Sukhothai era the temple was adapted into a Buddhist monument and the stone pillars out front would have supported the ceiling of a main wihaan Dhamma hall.
Aesthetically much different than most other Sukhothai shrines, Wat Si Sawai offers a bit of variety, and you can still walk right into the ancient sanctuaries.