Wat Salak or the "Monastery of the Chisel" was situated on Ayutthaya's city island in present Pratu Chai sub-district, bordered by Khlong Makham Riang.
The monastery stood opposite Wat Langka on the westbank of Khlong Makham Riang in former times called Khlong Nai Kai; a canal connecting Khlong Ho Ratana Chai in the north-east with the water ring in the south. The canal had its southern mouth at the Pratu Nai Kai, a water gate situated just west of Phet Fortress. Naresuan Road is situated just north of this vanished monastery.
Historical data about the monastery and its construction are unknown.
The monastery features also on a mid-19th century map but on the north side of the road leading from the Pa Than Bridge towards Pratu Joa Jin along the Front city canal. This road was called in earlier times Pa Than Rd, but was renamed Naresuan rd. The monastery features under the name Wat Sa on the map.
Addendum & maps by Tricky Vandenberg - January 2011