The Temple of Haeinsa, on Mount Gaya, is home to the Tripitaka Koreana , the most complete collection of Buddhist texts, engraved on 80,000 woodblocks between 1237 and 1248. The buildings of Janggyeong Panjeon, which date from the 15th century, were constructed to house the woodblocks, which are also revered as exceptional works of art. As the oldest depository of the Tripitaka , they reveal an astonishing mastery of the invention and implementation of the conservation techniques used to preserve these woodblocks.

Źródło: World Heritage Convention
http://whc.unesco.org/en/list/737