The Monastery of the Mound being dilapidated and in ruins, the King thereupon manifested His holy compassion by speaking over the heads and over the pates and commanding that the primary grand chief head marshal to have it restored and then to have a holy residence established beside the monastery. His Majesty went went out in holy royal procession to reside [there], sometimes for one month some times for two months, and sometimes for three months at a time."
The king's interest in the site was strong enough that he visited often over a three year period until the restoration was complete. However, the restored monastery survived only for about sixty years as it was decimated during the Burmese sack of Ayutthaya in 1767.
A curious feature is the sixty meter long corridor connecting the east facade of the ubosot (ordination hall) with the east entrance. The importance of the temple in the Ayutthayan era is evident in the detail lavished on the principle chedi to the west of the ubosot. The chedi's base is surrounded with statues of the front quarters of elephants in a manner reminiscent of Sukhothai temples of the previous dynasty such as Wat Chang Lom in Si Satchanalai.
The temple stands just 270 meters north northwest of Wat Chang. Between the two temples is the ruin of the pavilion that King Thai Sa likely used to oversee the renovations. A number of temples were built in the vicinity as this area comprises one of the dryer areas of land near Ayutthaya city island.
The temple is mentioned at least three times in the Royal Chronicles of Ayutthaya. The first reference is to the foundation of the temple in 1424 during the first year of King Borommarachathirat II's rule. The second reference concerns an attack near the monastery by the king of the 'Hongsawadi' (the Burmese) lead by Maha Uparat. The defenders, lead by Caophraya Maha Sena were successful in repelling the first attack, but were unable to stop Maha Uparat's men from crossing through a canal near Wat Maheyong. Although the Burmese prevailed, they were apparently forced to goad their men into attacking by threatening them with decapitation, and a number of the invaders drowned in their crossing of the canal.
The final reference is to an episode in 1568-69 during another war with the Burmese when the commander of the enemy forces encamped at Wat Maheyong while his allies attacked the city from all sides. The city eventually fell in September 1569 after a nine month siege. The Ayutthayan King, Mahinthrathirat, was made to present himself before the King of the Burmese at Wat Maheyong. He and his family were later led to Pegu in captivity. Although Portuguese traders were active in the city at the time, unfortunately no Portuguese chronicles survive to narrate their version of events.