In the early Joseon period, the government established four separate repositories, in Chunchugwan (春秋館), Chungju County (忠州), Jeonju County (全州), and Seongju County (星州), to store the Annals of the Joseon Dynasty (朝鮮王朝實錄) and other important literatures of the state. The locations of those repositories were selected with a careful consideration for the easy access and efficient management. However, during the Japanese Invasion of Joseon (1592-98), all repositories but the one in Jeonju were destroyed and the stored documents were burned down as well. The reason of this catastrophic damage was the vulnerable locations of those repositories. They were built in important traffic centers of the country so that invaders could easily find and destroy them. After gaining this painful lesson, the Joseon government determened to establish the priority in safe custody of the Annals and other important books. When five more copies of the Annals were restored after several years of hard work, new repositories were needed. Beside the re-established repository of Chunchugwan, the other new repositories were built in the backwoods; Myohyang-san (妙香山) (later moved to Jeoksang-san (赤裳山) in 1633), Taebaeksan (太白山), Odaesan (五臺山), and Mani-san (摩尼山) (later moved to Jeongjok-san (鼎足山) in 1678). Since the mountain repositories were located in almost inaccessbile mountain ranges, it required a great deal of effort to approach them. Even though it caused inconvenience in respect of the management of the repositories, the Annals and other important literatures were kept safely, and most of them are still existing today.