This place is also called the “sacred place in Wanggung-ri.” There are many different views on the site -- some believe it to be the capital of the ancient Mahan Dynasty, some consider it to be the place where King Mu of the Baekje Dynasty built a new palace and the capital, some think it was the capital of the Latter Baekje founded by Gyeon Hwon, and some believe it to be the place where Anseung founded the Bodeok Dynasty. Gwanseeum eungheomgi (Record of the Miraculous Responses of Avalokitesvara) has a record of King Mu of the Baekje Dynasty moving the capital to this place. This record has been the basis for the historical hypothesis that the capital was moved to Iksan during the late Baekje Dynasty. Based on several excavations by various groups, the remains were believed to have been built from the late Baekje Dynasty to the late Unified Silla Dynasty. Two kilns for baking roof tiles from the Unified Silla Dynasty have been found 30m east of the stone pagoda. The remains of a fortress, believed to be a rectangular fortress built on the flat ground, have been excavated around the pagoda. The exact shape of the fortress has been revealed little by little through the intensive excavation. As a very important discovery for research on the history of Korean fortresses, 1m wide unknown facilities built with level stones in and outside of the fortress wall have been excavated. With the Five-story Stone Pagoda in Wanggung-ri (National Treasure No. 289), the vestiges indicating the layout of the ancient temple, and the excavated remains of the outer fortress surrounding the temple site, this site has drawn the attention of historical academic circles as archeological evidence supporting the hypothesis that King Mu might have moved the capital to Iksan during the late Baekje Dynasty.