It is a temple site of the United Silla Dynasty located in Uncheon-dong, Cheongju. The excavation in 1985 confirmed the building sites including the site of a main hall, Seohoerangji, or site of west-corridor, auditorium, annex, etc. Pieces of gold ornaments with the name Heungdeoksa carved on them were discovered, suggesting that the temple's name was Heungdeoksa. Considering the relics such as tile with “Daejung Year 3” and other items, the temple is estimated to have been built in the 9th century but burnt down at the end of Goryeo. Lots of bronze ware such as chimi or the dragon head-shaped tile put on the angled top of a gable roof for decoration, pieces of tiles, vessels, etc., were excavated and are of great help to the research on art history. The discovered Jikjisimche yojeol (Collected Zen Buddhist Sermons) is a relic of great significance in printing history.