Historians believe the mountain fortress was built in the first place during the Three Dynasties Period.
It was renovated in the 9th year of King Taejong (1409) of the Joseon Dynasty and in the 2nd year of King Gwanghaegun (1622), respectively.
An inner fortress and a government office inside were also built in the 2nd year of King Gwanghaegun.
Since a small fence on the wall along was fixed again in the 4th year of King Hyojong (1653), its military function was upgraded and consolidated extensively. The outer fortress is 2 km long and the inner one 700m long, which were stone built, both.
During the Donghak Movement (1894), the peasants' uprising in the late Joseon Dynasty, most of the buildings were burned down, now only the sites of south, north, east and west gates are left.
Korea is one of the oldest continuous civilizations in the world with over five thousand years of history. According to the original creation myth, the world we live in today is the work of the Heavenly Prince Hwanung, whose father was the King of Heaven.The Heavenly Prince asked his father to give him some land to govern, so the Father sent him down to Mount Taebaek. With him the Prince brought the Minister of Clouds, the Earl of Rain and the Chancellor of Wind. They also brought three thousand helpers.Under the shade of a sandalwood tree the Prince founded a holy city called Sinsi, the City of God. He put his Ministers in charge of three hundred and sixty areas of human culture, teaching them to grow crops and to make laws concerning what is good and what is evil.A tiger and a bear living in a nearby cave saw this city and desperately wanted to become human. Every day they came to the sandalwood tree at the center of the city to pray fervently for becoming humans.Hwanung saw their devotion and gave them instructions to remain in the cave and fast for one month, eating nothing but garlic and mugwort. The tiger was too impatient to stand the long and boring days in the cave, so he gave up and left, but Bear maintained the fast. At the end of the month she was transformed into a beautiful woman who became the mother of the Korean people.Her first son was Don-gun, the First King of the Korean people. When Don-Gun passed on the throne to his own son, he became a Mountain God. It is interesting that mountain gods are still worshipped today in Korea.Text by Steve Smith.