Phra Si Rattana Temple or locally known as Wat Yai is considered to be the most important temple in Phitsanulok. It was built in 1357 during the reign of Phra Maha Thamma Racha I of Sukhothai Kingdom to enshrine the famous Phra Buddha Chinnarat statue. Phra Buddha Chinnarat is a bronze-casted statue widely considered the most beautiful image of the Buddha in Thailand. The statue’s unique feature is the halo that signifies the spiritual radiance of the Lord Buddha; it then becomes an influence to Buddha images in later years. The statue was coated in gold by King Ekatotsarot in 1931. Every year in January, there is a festival to celebrate Phra Buddha Chinnarat. Other interesting architecture details include the ordination hall's