The important feature Wat Lokayasutharam is a huge reclining Buddha image, called Phra Bhuddhasaiyart, which faces to the east.
It was constructed of bricks and cement in the art style cf the Middle Ayutthaya Period. It is 37 meters long and 8 meters high. There are other impressive Reclining Buddha Images in Ayutthaya, but this seems to be the largest.