Prang Ku is an archaeological site that has the plan as same as the drug treatment court in the 18th century Buddhist. There are Buddha image in the middle and ancient library in the front, surrounded by the walls that contain Gopura at the front side. Prang Ku was made of laterite bricks except for the door and window frames. The lintel pillars are all sandstone facing east. In the northeast of Prang Ku, there is a pool that is in good condition. Especially, the Buddha image consists of square plan of 5 meters in size with twelve recessed wood.