Wat Phra Si Rattana Mahathat

Wat Phra Si Rattana Mahathat, commonly called Wat Yai, is a major Buddhist temple in Nai Mueang, Mueang Phitsanulok, on the east bank of the Nan River. Founded in 1357 during the Sukhothai period, it is renowned for housing Phra Phuttha Chinnarat, one of Thailand's most revered Buddha images. The complex features a Khmer-style prang, ornate viharn, gilded decorations, and a small museum, making it the spiritual and cultural center of Phitsanulok Province.

Visitors can expect a large active temple complex centered on the main viharn housing the gold-covered Phra Phuttha Chinnarat Buddha image in meditation posture. The grounds include a 36-meter Khmer-style prang, secondary chapels, cloisters, Buddha image galleries, and the Phra Phuttha Chinnarat National Museum. The setting is urban, beside the Nan River, with paved courtyards, souvenir shops and food stalls outside. Visitors can observe worship, merit-making, mural paintings, and traditional architecture.