Haeinsa Temple was built in 802 AD and is regarded as one of Korea’s three major Buddhist temples along with Tongdosa and Songwangsa. Of the numerous temple halls, most were built in the modern era, with only Janggyeongpanjeon Hall from the early Joseon Dynasty remaining in its original state. However, the temple holds great significance not only for its structure, but also for the treasure it holds inside.Janggyeongpanjeon is a wooden building housing the 13th-century Goryeo Palman Daejanggyeong (the Tripitaka Koreana), a priceless world treasure. The Tripitaka Koreana is a large set (thousands and thousands) of wood blocks that were specially treated to prevent aging and inscribed with the Buddhist canon. It is the oldest and most complete version of the Buddhist canon and is one of the most cherished Buddhist doctrinal collections in the world.Janggyeongpanjeon is comprised of two buildings Sudarajeon to the south and Beopbojeon to the north. Unadorned by decorations or paintings, the buildings carry out the sole function of storing the Tripitaka Koreana wooden tablets. The building has been praised by scientists for its effective air circulation, resistance to moisture, and temperature control – all of which have enabled the Tripitaka Koreana to survive throughout the years. Although the exact date of Janggyeongpanjeon’s construction is still unknown, the hall was built under the order of King Sejo in 1488. It has never suffered the effects of fire or war.In recognition of its architectural beauty and its extraordinary scientific preservation of the world’s only Tripitaka, Janggyeongpanjeon of Haeinsa Temple was listed as a UNESCO World Cultural Heritage in 1995.