Wat Phra Si Rattana Mahathat, known among the locals as “Wat Yai”, was founded in 1357 by King Phaya Lithai [1] (King Maha Thammaradscha I of Sukhothai). The temple was built at the same time “Wat Phra Phut Chin Si” and “Wat Phra Si Satsadaram. During the Somdet Phra Ekatotsarot age in Ayutthya kingdom, it was gilded with the Buddha’s image and later developed by King Rama 5 and King Rama 9 respectively. The temple is located at the foot of Naresuan Bridge. On the city side of Nan River. It has an area of 36 rai (1 rai = 1600 m^2).[2] The temple is very famous because it has golden Buddha image name “Phra Phuttha Cinnarat”. In addition many Thai people considered to be the most beautiful Buddha image in Thailand.[2]