Wat Rong Tham was a monastery situated off the city island in the eastern area at present Phai Ling sub-district.
The monastery stood south of Wat Pradu. The premises of Wat Rong Tham and Wat Pradu were merged to become Wat Pradu Rong Tham, presently known as Wat Pradu Songtham
Its historical background and period of construction are unknown.
The site is indicated on Phraya Boran Rachathanin's map drafted in 1926.
Other Ayutthayan temples which were merged at a certain stage are Wat Sri Pho (Wat Sri Pho & Wat Kalayaram) and Wat Tha Ka Rong (Wat Tha & Wat Ka Rong).