From wikipedia: The Tripitaka Koreana (lit. Goryeo Tripitaka) or Palman Daejanggyeong (“Eighty-Thousand Tripitaka“) is a Korean collection of the Tripitaka (Buddhistscriptures, and the Sanskrit word for “three baskets”), carved onto 81,258 wooden printing blocks in the 13th century. It is the world’s most comprehensive and oldest intact version of Buddhist canon in Hanja script, with no known errors or errata in the 52,382,960 characters which are organized in over 1496 titles and 6568 volumes. Each wood block measures 70 centimeters in width and 24 centimeters in length. The thickness of the blocks range from 2.6 to 4 centimeters and each weighs about three to four kilograms. The work is stored in Haeinsa, a Buddhist temple in South Gyeongsang province, in South Korea.
The Janggyeong Panjeon in the Temple of Haeinsa, on the slopes of Mount Gayasan, is home to the Tripitaka Koreana, the most complete collection of Buddhist texts, laws and treaties extant, engraved on approximately 80,000 woodblocks between 1237 and 1248. The Haeinsa Tripitaka woodblocks were carved in an appeal to the authority of the Buddha in the defense of Korea against the Mongol invasions. They are recognized by Buddhist scholars around the world for their outstanding accuracy and superior quality. The woodblocks are also valuable for the delicate carvings of the Chinese characters, so regular as to suggest that they are the work of a single hand. More: http://whc.unesco.org/en/list/737