Wat Yai Chai Mongkhon stands southeast of Ayutthaya's historic island. Its high victory chedi, long rows of seated Buddha images and living monastic grounds make it one of the city's most recognisable temples.
Ayutthaya's tourism office describes the temple as an early Ayutthaya foundation. Historical accounts connect the site with Wat Pa Kaeo and the royal history of King Naresuan; the name Chai Mongkhon refers to auspicious victory.
The tall chedi is the visual centre of the complex, with Buddha images lining the raised terraces. The temple combines a heritage monument with ongoing religious use, so give prayer areas and resident communities priority and check current access arrangements before visiting.