The Ku (stone tower) at the religious monument Ku Ka Sing was constructed in the 10th/11th centuries under the influence of Khmer culture. The monument is dedicated to the Hindu God, Shiva. The complex consists of three brick towers and two separate but associated buildings within an area surrounded by a U-shaped moat with a pond nearby. The three towers were built in Baphuon art style of Khmer culture. They are situated on the same laterite base with sandstone decorative elements. The middle tower is the main tower in which a green stone linga was found. Other associated buildings were built on a laterite base facing west towards the towers. The complex is surrounded by a rectangular wall built in laterite and brick. There is also a laterite library facing west towards the towers. Important archaeological evidence from excavations have unearthed a gold ornament in the form of a Naga and a gold plate used in the foundation stone laying ceremony. Currently these items are on display at the Roi Et National Museum. The design and layout of the complex at Ku Ka Sing is consistent with other monuments found in northeastern Thailand which date from the 10th/11th centuries.
Ku Ka Sing was registered as a national ancient monument in March 1935.