Brief synthesisEstablished in the 8th century under the Silla Dynasty, on the slopes of Mount Tohamsan, Seokguram Grotto and Bulguksa Temple form a religious architectural complex of exceptional significance. Bulguksa is a Buddhist temple complex that comprises a series of wooden buildings on raised stone terraces. IntegritySeokguram Grotto portrays the enlightenment of Buddha and Bulguksa Temple represents the Buddhist utopia taking its form in the terrestrial world. The most significant threats facing Seokguram Grotto are moisture and condensation, which cause the growth of mould, mildew and moss. A ventilation fan in Seokguram Grotto, whose vibration posing a risk, has been removed, and the number of visitors is properly controlled.