It is located at Ban Yang Ku, Tambon Ma-ue. Prang Ku is a complex of buildings with a plan that resembles the Khmer nursing home known as ‘Arogayasala’. It comprises the main prang, a library, wall and entrance pavilions, and a pond outside of the wall. The ruins are in good condition, especially the roof structure of the main prang which still maintains its three tiers and the lotus base of the pinnacle. Other ruins of the temple have been restored and are located in a shady environment.
Apart from this, to the southeast inside of the front wall, there are many more archaeological finds being kept such as a sandstone lintel depicting a personage sitting on an elephant’s or bull’s back in a niche above the Kala face. The abbot of Wat Si Rattanaram where Prang Ku is located said the lintel belonged to the front porch of the main prang. There are also 2 fragments of colonnette; one with a hermit at the base, a large Siva Lingam with its receptacle – Yoni - and a fragment of the pinnacle’s lotus base, which was adapted to be the base of a stucco image of Phra Sangkatchai. Prang Ku was built during the 12th – 13th Century A.D.
To get there: From the city, take Highway No. 23 (Roi Et – Yasothon) for 10 km. until reaching Thawat Buri district, then turn left for 6 km. to Prang Ku. Or take Highway No. 2044 (Roi Et – Phon Thong) for 8 km., then turn right for just about 1 km. to Prang Ku.