Located in Chiang Saen old town, was build by King Saen Phu, the 3rd ruler of the Lanna Kingdom in early 13th Century.

Ancient sites include the bell-shaped, Lanna style principal Chedi which measures 88 meters height with a base 24 meters width, is the largest structure in Chiang Saen. There are also remains of ancient Viharn and Chedi.