Located about 1 kilometer from Chiang Saen District, Wiang Sub-district, Chao Saen Phu built it in 1295 and planted 300 teak trees around the wall, so it was named "Wat Pa Sak". At this monastery, inside the temple, there is an important ancient temple. The main chedi in the shape of a bell decorated with exquisite stucco patterns It contains the Buddha's relics. A right axillary bone from Pataliputra.