Wat Klang Khlong Sra Bua on the maps
The site is mentioned on Phraya Boran Rachathanin's map drafted in 1926 CE. On his map, the temple is simply named Wat Klang. Wat Bailo stood northeast (3), Wat Raeng south, while Wat Phra Kalayaram (4) stood opposite the canal. Phraya Boran (1871-1936 CE) was the Superintendent Commissioner of Monthon Ayutthaya from 1925 till 1929 CE but occupied important functions since 1896 CE in Monthon Ayutthaya.
Wat Klang figures on the Fine Arts Department maps of 1974, 1993 and 2007 CE.
The monastery is in geographical coordinates: 14° 22' 16.58" N, 100° 33' 36.44" E.
There were four more temples with the same name in Ayutthaya City District: The ruin of Wat Klang and Wat Khlang Khlong Takhian (Wat Klang Pak Kran) in Pak Kran Sub-district Wat Klang Tai (defunct) and Wat Klang Nuea (Wat Klang Raman) in Suan Phrik Sub-district.
Footnotes:
(1) Khlong Sra Bua, or the Lilly Pond Canal, is a canal situated in the northern area off the city island in the Khlong Sra Bua district. The waterway splits from Khlong Hua Ro between Wat Ngiu (defunct) and Wat Si Liam. The canal has its mouth at the City Canal (Khlong Mueang) between Wat Na Phra Men and Wat Mai in front of the north-eastern corner of the Grand Palace. The canal was a shortcut in the old Lopburi River.
(2) Thung Kaeo, or Crystal Field, is an area north of the city of Ayutthaya bordered on the west and north by Khlong Sra Bua on the east by Khlong Hua Ro, and on the south by Khlong Mueang.
(3) Based on the 2007 Fine Arts Department map Wat Bailo is south of Wat Klang.
(4) Wat Phrom Kalayaram on the 2007 Fine Arts Department map. ‘Kalaya’ means ‘older sister’ in the Thai language.