 Wat Phra Si Rattana Mahathat

Wat Phra Si Rattana Mahathat (; "Temple of Great Jewelled Reliquary"), colloquially referred to as Wat Phra Si () or Wat Yai (; "Big Temple"), is a Buddhist temple "(wat)" in Phitsanulok Province, Thailand, where it is located on east bank of Nan River, near Naresuan Bridge and opposite Phitsanulok Provincial Hall.It is about 337 km (209 mi) from Bangkok.