The chronicles mention that in 1610
A.D. King Songtham ordered the image known as Phra Mongkol Bophit
to be moved from the east to the west and commanded the
construction of a mandapa to house this image of the Buddha. In
1612 A.D. an order was carried out to level the earth in front of
the vihara so that cremations could take place there Phra Mongkol
Bophit has been identified as the image which King Chairachathirat
had ordered sculpted in 1538 A.D. at Wat Chichiang.
From available evidence we know that
King Chairachathirat ordered the building of Wat Chichiang and a
chedi in the vicinity of a cremation spot, and the casting of an
image. King Songtham close to limit the area for cremations to the
central part of the town, near Wat Chichiang; this was the reason
for moving the Buddha image (Phra Mongkol Bophit) to a new spot in
the Western sector, after which its original site was used for a
cremation area.

The Bronze Buddha image at Wat Mongkol
Bophit is one among the biggest images in Thailand.
The exact date of the image could not be obtained, however, the
Sukhothai influence shows on the features of the image indicates
that the image was built in early Ayutthaya between the time of
King Trilokanath and King Song Tham
In the reign of
King Sua (1697-1706 A.D) lightning struck the top of the mandapa
and it collapsed; The head of Phra Mongkol Bophit fell of. As a
result the King had the mandapa rebuilt and turned into a vihara.
In the reign of King Borommakot (1732-1758 A.D) another
restoration took place. When Ayutthaya was sacked the vihara was
apparently burnt.
The Phra
Mongkol Bophit image was last restored in 1955 A.D. At that time a
quantity of buddha images were found on the left shoulder of Phra
Mongkol Bophit. They are now kept in the Chao Sam Phraya national
Museum.
In 1990 A.D.
the Mongkol Bophit Foundation in Ayutthaya desired to cover the
image with gold leaf. This was approved by the Fine Arts
Department. The work was completed two year later.