Wat Noi or the Little Monastery (1) was located on the city island in the northwest of Ayutthaya in Pratu Chai sub-district. The temple was located on the north bank of an ancient canal called Khlong Chang Maha Chai. Wat Sop Sawan was on the western side of the temple, while Wat Khok Chang stood on its east.
There are no traces anymore of the former monastery. A Thai Army camp has been constructed on the site. The temple has been classified as disappeared.
Historical data about the monastery and its construction are unknown.
The site is mentioned on a mid-19th century map. On the latter map the monastery is depicted with two chedi, on the west side of the old ring road and close to the Kaeo Bridge crossing the Chang Maha Chai Canal.