WAT KHUN MUEANG JAI (วัดขุนเมืองใจ)
Wat Khun Muang Chai is a large temple ruin located on the city island. It can be easily
found on the northern side of Rojana Road, just before the intersection with Chikun
Road. The Fine Arts Department restored this monastery in 1969-1970 and once again
in 2006.

Wat Khun Mueang Jai was once located beside
Khlong Pratu Khao Pluak, but this
canal has since been buried. It is most likely featured on several maps by foreigners,
including Vingboons 1660 map and de La Mare 1751 map (though in the latter it is
slightly misplaced). This monastery also appears on
Phraya Boran Rachathanin’s 1926
map. Interestingly, Phraya Boran Rachathanin draws it at on northwest/southeast axis.
This seems odd because Wat Khun Mueang Jai clearly runs from east to west, and it
perfectly parallels Rojana Road.

Wat Khun Mueang Jai consists of four primary structures: an ubosot, one viharn, a large
stupa, and a two-story living quarters. Of these structures, the large stupa is probably the
most breathtaking. The tall base of the stupa consists of several layers that support a bell-
shaped body as a type of relic chamber. One layer is superimposed over another. This
style of Thai architecture is known as "Yok Ket". On the southeastern side, a surviving
corner chedi is still visible. There are very few monasteries resembling Wat Khun
Mueang Jai in Ayutthaya (
Wat Ayodhya being one of them). This chedi has low walls
above its indented base that are designed to look like balustrade walls. These still have
some decorative stucco patterns intact - including a few niches where a standing Buddha
image can still be seen. These patterns and Buddha images reflect a Khmer influence,
and there is evidence that several restorations were done on the chedi during ancient
times (TAT 114-115).   

There are sermon halls on both sides of the central chedi. These have been restored by
the Fine Arts Department as well. The sermon hall on the western side is very elaborate.
Its foundation is in good shape and a large number of chedi are in situ. One of these
smaller chedi (with a hollow entrance) is at an angle so steep that it appears to be falling
over. The sermon hall on the eastern side is much smaller and more damaged.
Nevertheless, this structure includes some remnants of Buddha images and a reasonable
preserved foundation layer. A large bodhi tree grows out of its altar. A two-story
building is located on the northwestern side of Wat Khun Mueang Jai. This type of
structure is associated with residential halls of highly positioned monks or members of the
royal family. There are ones like it at
Wat Kudi Dao and Wat Chao Ya.

Wat Khun Mueang Jai is a very ancient temple. It may pre-date the establishment of
Ayutthaya in 1351. In fact, this monastery is often connected with Ayodhya - an earlier
settlement east of the city that had a connection to the Lopburi empire. “Archaeologists
have found traces of a pre-12th century Dvaravati town on and below the island of Wat
Khun Mueang Jai,
Wat Maha That, and Tambon Bang Kracha (Garnier 39-40). This
claim is backed up by a map hanging on the walls of the Ayutthaya Historic Study
Center. The map suggests that there were also a collection of Brahmin shrines north of
Wat Khun Mueang Jai. The collection of multiple religious sites within the same alignment
implies that Khlong Pratu Khao Pluak was the boundary of the former Ayodhya
settlement. This belief is supported by a number of historians.
"When the city was
founded in the reign of King U-Thong, the eastern perimeter probably stretched
only to Pratu Khao Phuak or
Pratu Jin canal, situated in the middle of the island"
(Kasetsiri & Wright 320).

Even though Wat Khun Mueang Jai is quite ancient, there are not many records of its
history. Documents refer to it being used for the important ceremony of taking oaths of
allegiance (TAT 114-115).  Royal Chronicles mention a Khun Muang who was a noble
during the reign of King Borommatrailokanat, who ruled Ayutthaya from 1448-1463
before ruling in Phitsanulok for twenty years (Cushman 15). A second Khun Muang is
referred to during the reign of King Narai. This man was appointed to the right wing of
the Royal army sent to Sukhothai. An oath of allegiance was taken around that time
(Cushman 253). However, it is uncertain if these passages have any connection to the
monastery.
Monastic structure in situ
The main stupa of Wat Khun Mueang Jai
Satellite chedi
Remaining stucco - enhanced
Text & photographs by Ken May - August 2009
Maps by Tricky Vandenberg - October 2014
(Monastic structure in situ)
(The main stupa of Wat Khun Mueang Jai)
(Satellite chedi)
(Remaining stucco - enhanced)
Detail of a 19th century map
Detail of Phraya Boran Rachathanin's map - Anno 1926
(Detail of a 19th century map - Courtesy of the Sam
Chao Phraya Museum - map is orientated S-N)
(Detail of Phraya Boran Rachathanin's map - Anno
1926)
Detail of a 2007 Fine Arts Department GIS map
(Detail of a 2007 Fine Arts Department GIS map -
Courtesy of the Fine Arts Department - 3th Region)