Wat Wongjak, or the Monastery of the Chakra (1), is a brick mound located off the city island in the northern area of Ayutthaya in the Phukhao Thong Sub-district in the Phukhao Thong Felds (2). It was once situated within the Khlong Maha Nak defensive system of canals (3).
A small shrine is constructed on the site, gathering the remains of several Buddha images, next to many bricks, pottery shards, and roof tiles scattered around this site.
The area is prone to heavy flooding in the rainy season, which has taken its toll on the ruin.
The monastery shows on Phraya Boran Rachathanin's map drafted in 1926 CE. Phraya Boran (1871-1936 CE) was the Superintendent Commissioner of Monthon Ayutthaya from 1925 to 1929 CE but occupied important functions since 1896 CE in Monthon Ayutthaya.
The ruin is mentioned as Wat Kong Jak on a Fine arts Department map designed in 2007 CE, but I presume this is a printing mistake.
The site is in geographical coordinates: 14° 21' 36.81" N, 100° 32' 45.70" E.