Wat Chi Thammo, or the Monastery of the Dharma Nun, was located off the city island in the southern area of Ayutthaya in the Samphao Lom sub-district (1).
It was situated on the south bank of the Chao Phraya River, west of Wat Khun Phrom.
In situ, close to the waterfront, the foundation of a small monastic building still can be seen.
Its historical background and period of construction are unknown.
The site is indicated on a 19th-century map (วัดชีทำโม) and Phraya Boran Ratchathanin's map drafted in 1926 CE (วัดชิธรรโม).
Based on the 2007 CE Fine Arts Department map, the site is in geographical coordinates: 14° 20' 36.41" N, 100° 34' 1.26" 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."