Wat Phra Kamphaeng Yai is home to Prasat Kamphaeng Yai, a large and perfectly intact Khmer sanctuary. It has three pagodas lined up on the same base along a north-south axis and facing east. The principal pagoda is made mainly of sandstone with some brickwork while the other two pagados are made in brick with decorative sandstone features including the lintels, pediments and doorframe. It is believed the sanctuary was built around the 11th century to worship the God Shiva but was converted in the 13th century to Mahayana Buddhism.

Source: onsite information