Wat Mahathat is believed to be one of Ayutthaya's oldest temples, possibly built by King Boromaraja I (1370-88).
Wat Phra Mahathat, Thailand, was a royal Temple of the Ayutthaya Kingdom. It is one of the oldest and most significant temples in the history of Ayutthaya as it housed the Buddha's holy relic. Many important royal ceremonies of the Ayutthaya era had been hosted here. When the Ayutthaya Kingdom failed in 1767, Wat Phra Mahathat was severely damaged by fire and was since abandoned.