Wat maha that is located to the east of the grand palace. It is the royal temple and most scared in ayutthaya during the glorious time. Buddha relies were ensgrined in the Mahathat Chedi (the principal pagoda). This monastery was once the residence of the supreme patriarch. Ayutthaya chronicle said mahathat chedi was starting to be built in the reign of phra borom rajathirat I in 1374 and completed in the reign of king ramesuan