Wat Phra Si Mahathat Wora Maha Viharn (Thai: วัดพระศรีมหาธาตุวรมหาวิหาร) is a Buddhist temple in the Bang Khen District of Bangkok. Construction began in 20 March 1941 in commemoration of the government victory over the Boworadet rebellion in 1933. Wat Phra Si Mahathat was designated a first-class royal monastery in 1942, making it one of the most significant temples in Thailand. The temple is served by Wat Phra Sri Mahathat BTS station since June 2020.