Wat Phra Mahathat Woramahawihan is the main Buddhist temple (wat) of Nakhon Si Thammarat Province in southern Thailand. The main stupa of the temple, Phra Borommathat Chedi, was built by King Sri Dhammasokaraja in the early-13th century CE to establish a symbol for the Theravada Buddhism sect in the province. The temple is believed to house a tooth of Gautama Buddha.