Wat Jin or the "Chinese Monastery" was located on the city island in the southeastern part of Ayutthaya in Ho Ratanachai sub-district on the premises of present Wat Ratanachai.
On a mid-19th century map, Wat Jin was located south of the Ho Rachakru Fortress. On the 1974 Fine Arts Department map the temple is indicated behind the Ho Rachakru Fortress (north of), and adjacent to the College Constantin. The site is also indicated on Phraya Boran Rachathanin's 1926 map.
Historical data about the monastery and its construction are unknown.
There are no traces anymore visible of the monastery above ground level.
Some remains of the temple were excavated by the Fine Arts Department (FAD) in Geo Coord: (later)