The Cheonjeon-li Square Stone has been first found by the Korean Buddhist Research Institute in December of 1970 with professor, Moon Myoungdae and has been preserved as the national treasure no. 147 on May 4, 1973. The area, where the Cheonjeon-li Square Stone is located, is well-known for its superb view with its location on the center of Daegokcheon, the tributary of the Taehwa River, since the Prehistoric age and also during the Silla Dynasty for training of the elite youth corps of Silla, called the Hwarang and in particular, it was famous scenic spot among the province during the Chosun Dynasty for wandering poets and governors from everywhere who carved their poems on the rock wall while numerous artists painted landscapes as well. This rock wall has been well preserved because it is stood 15° forwards getting no weathering while it is located far higher than the river-bed mostly not concerning about water damage however, sometimes when there is a deluge, it is sometimes half sunken in water. The upper part features inscribed geometric pattern, animal and abstract human figures while the lower part features variously mixed linear drawings and characters, cavalcade, animals, and dragons. This indicates categories of the upper and lower parts are obviously different. The art could have been done by numerous people throughout the long time while the art features lifestyles of prehistoric age through the Silla Dynasty. Aged Yangjeon-li petroglyphs feature singular pattern while the Cheonjeon-li Square Stone is more meaningful relic featuring various elements from various ages. Lithology is purple shale (it is sedimentary rock kind from the Cretaceous period of the Mesozoic age and it develops as stacked layers along with sandstones while thin layers can be fallen off when the granularity is low. Although it is somewhat strong on weathering, it is weak on heat of ideal material to inscribe rock arts. Reference : Bangudae (1984, Hwang Sooyoung, Moon Myoungdae) Ulsan Petroglyphs of Bangudae (2000. Ulsan Megalopolis)