Wat Nang Phaya was built during the reign of Somdej Phra Borom Trai Locanat of Ayutthaya. The temple bears similarity to the architecture of Wat Rajburana, built by the same monarch, who resided in Phitsanulok for 25 years. The famed ‘Phra Nang Phraya’ Buddha images were first found in the cellar of the temple in 1901 and more were found in 1954. One of the five most popular sets of Buddha images nationwide and widely regarded as sacred, they have become much sought after by collectors.