Contains one of the most impressive Buddha images in the country. A huge, moss-covered sitting stucco over brick image, measured over 13 meters across the lap, and over 12 meters high. The figure, in the position of Subduing Mara (Temptations), sits in an old roof-less chapel. The west wall of the chapel is hollow, with secret passageway leading to a concealed opening near the image's head, where a hidden person can speak out as the voice of the image. According to an old legend, King Naresuan the Great of Ayutthaya, while leading an army to fight Burmese invakers assembled his battle commanders in the chapel to hear "inspiring message from above" to boost their morals.