Somdet Phra Ramathibodi I or King U-thong commanded the construction of his royal house in this area, but when Somdet Phra Borom Tilokkanat succeeded the throne, the king considered moving the royal palace further north and converting the piece of land into a sacred ground which later became this temple. During the reign of Ramathibodi II, an enormous Buddha image was cast. The Buddha image of “Phra Sri Sanphetdayan” is 16 meters high and its surface is coated with 143 kilograms of gold. It had been enshrined inside the assembly hall until the fall of Ayutthaya in 1767 when the Burmese invaded and melted the gilded gold away. The Buddha image was seriously damaged, so in the Rattanakosin period Phra Bat Somdet Phra Buddha Yodfa Chulaloke installed the broken core of Phra Sri Sanphetdayan in a pagoda inside Wat Phra Chetupon Vimolmangkalararm Rajvoramahaviharn in Bangkok and named the pagoda “Chedi Sri Sanphetdayan”