These tumuli were located in the back hills of naturally established farming villages. Since only a few have been found, and given their almost flat shapes, (despite their rather large sizes), they are commonly referred to as horses’ tombs. During the excavation projects in 1975 and 1976, 30 or more civilian tombs were found at the site, some of which were from the Goryeo and Joseon periods.
Currently, the area extending to 29,752m2 centering on the eight tumuli is designated as a protected area, and developed into a park. The interiors of these tumuli were restored and have since been open to the public.
The walls were made of naturally shaped stones, with arches applied to the ceiling. The traces of a mural are invisible and most of the presumed burial accessories are no longer there. However, as the site followed the burial system that continued from 5 BC to the end of the Baekje period, and as the size of these structures is enormous, it is reckoned that this is the site of what was a tomb of a king or a noble person close to the royal family.
From the discovery of fireplaces, usually only found in prehistoric residential remains, as well as stone statues, fragments of a stone knife, and Baekje-era earthenware, this area is estimated to have been the basis of civilization for a long period of time. As the No. 1 tomb, the side entrance stone chamber tomb, exhibits enormous structural similarities with the No. 5 tomb in Songsan-ri, Gongju, which was the capital of Baekje in the middle years, it is possible to make a connection between the tumuli in Bangi-dong and the tumuli in Gongju.
These tumuli, along with the tumuli of Garak-dong and Seokchon-dong, are the remains that hold enormous cultural and historical significance, given they reveal a lot about the customs practiced during the Hanseong Baekje period.