The monastery has been shown on all Fine Arts Department maps since 1974 CE.
The site is in geographical coordinates: 14° 20' 0.97" N, 100° 34' 14.58" E.
Footnotes:
(1) Sub-district called after the village Ban Samphao Lom near the Chao Phraya River. The village is on the Monthon Krung Kao map (1916 CE). John Bowring (1857, London, John W. Parker and Son, West Strand), in his book ‘The Kingdom and People of Siam’, wrote: "Between the modern and the ancient capital, Bangkok and Ayuthia, is a village called the “Sunken Ship,” the houses being erected round a mast which towers above the surface at low water."
(2) Khlong Thet (เทศ) is a defunct canal situated south of Ayutthaya between Khu Cham and the Lopburi River (present Chao Phraya River). The canal ran parallel and close to the main river, immediately west of the two Portuguese churches (San Pedro and San Paolo) and extending a long way southwards. Its name means 'foreign' origin, usually meaning from India or Arabia.
(3) Based on the Royal Chronicles of Ayutthaya, King Chakkraphat (reign 1548-1569 CE) established Nakhon Chai Sri by joining some parts of Rat Buri and Suphan Buri (Cushman, 2006, p. 41)
References:
[1] Thompson, Peter Anthony (1910). Siam, an account of the country and the people. J. B. Millet, The Plimpton Press, Norwood, Mass., USA. pp. 291-2.