Wat Sao Chingcha, or the Monastery of the Swing Post, is a defunct temple located on Ayutthaya's city island in the Pratu Chai Sub-district, in the vicinity of the Chikun Bridge. This zone was the Brahman area of the city, and the site was likely a Brahman temple.
Based on a map of the 19th-century by an unknown surveyor, the monastery was situated on the east bank of Khlong Pratu Jin and partly along the road the French called "Rue des Maures" or "Moor Street", which is now more or less the present Pa Thon Rd (more or less as the ancient road did not have the width of the current lane). Wat Khok Rak (defunct) stood to the east, while Wat Khok Suea (defunct) stood to the south.
Historical data about the monastery and its construction are unknown. The 19th-century map indicates no existence of a chedi or prang. The temple is not shown on Phraya Boran Ratchathanin's map, drafted in 1926 CE, though he does mark a location called Thewa Sathan.
The temple's name refers to a post or posts of a swing. It could thus be that, at this location, a giant swing was installed in ancient times to perform the Brahmin rite “Tri Yampawai”. The swing was an enormous permanent erection, 25 to 30 meters high, that stood on a grassy plot in front of the Brahman temples. It consisted of a pair of great red-painted teak pillars, like ship's masts, which slope slightly inwards, and were joined at the top by carved cross-pieces. [1]
It is possible that the location called "Thewa Sathan" by Phraya Boran Ratchathanin on his 1926 CE map was part of the above temple. The construction of the present Pa Thon Road, unfortunately, destroyed much historical evidence.
The swing must have been near the Thewa Sathan shrine, at par with the Bangkok Giant Swing built in 1784 CE and positioned in front of the Thewa Sathan shrine in Bangkok by order of King Rama I to observe the yearly Brahmin New Year Ceremony (1). The ceremony was abolished in 1931 CE due to economic problems. (2) [2]
Assessing all the monastic structures within the zone demarcated by Chikun Road, Pa Thon Road, Pridi Banomyong Road, and U-Thong Road is rather complex, as the positions and names of the structures vary across different maps. On a 19th-century map, 15 structures are counted, while on the 20th-century PBR map, 13 are mentioned. There is an inconsistency in the names and the positions. Even maps drafted by the Fine Arts Department, which I presume are based on excavations in the zone, shed no light on this matter. The positions of monastic structures can be asserted, but their ancient names will remain questioned forever.