Wat Racha Phli or the "Monastery of the Royal Gift" was situated off the city island in the western area, along the west bank of the Chao Phraya River. The monastery was located at present Tambon Ban Pom, south of road No 3263 (leading to Ang Thong) and just south of Wat Kasathrathirat.
There are no traces remaining from this temple. A mini-mart has been built in situ. A local confirmed that there was some shrine in the vicinity, which has a link to the former monastery, but it is situated on private property and could not yet be traced.
The historical background and period of construction of the former temple are unknown; although, the monastery is mentioned in the Royal Chronicles of Ayutthaya as being the location where the Burmese positioned great guns and fired them off on the City of Ayutthaya in 1760. [1]
The site is indicated on a Fine Arts Department map drafted in 1993 and on Phraya Boran Rachathanin's map of 1926.
References:
[1] BCD - The Royal Chronicles of Ayutthaya - Richard D. Cushman (2006) - page 482 / Source: Phan Canthanumat, British Museum & Reverend Phonnarat.