The temple is believed to be built during the 14th century A.D. (the early Ayutthaya period). The main prang collapsed during the Ayutthaya period, but was restored. It collapsed again in 1911, so only the foundation of the main prang remains at present. As in most architecture of the early period of Ayutthaya, the main prang was the most important edifice in the temple compound.The highlights of Wat Mahathat include the octagonal pagoda, the plaster base of a Buddha image, the medium-size Prang with mural paintings about the life of the Buddha, and other smaller Viharas. The most prominent landmark of the temple is the head of a sandstone Buddha image entwined in the roots of a Bodhi tree.