Taesongsan Fort was enlarged in the first half of the 5th century when the Koguryo Dynasty transferred its capital to Pyongyang. It is a large-scale fort and its building technique is excellent.
Koguryo, which existed between 277 B.C. and A.D. 668, was the first feudal state of Korea.
It had a strong national might. It had promoted the work to enlarge the defensive Taesongsan Fort on a large scale while building the Anak Royal Palace as regards the transfer of its capital to Pyongyang in 427.
The Taesongsan Fort is 7,076 metres in circumference. It is the largest of mountain forts in Korea.
The fort can accommodate hundreds of thousand troops, which proves well that it is a mountain fort large enough to be a capital castle.
Hwang Kum Sok at the Academy of Social Sciences says:
"The South Gate, the main entrance to the Taesongsan Fort, was built on a basic establishment which is 13.8 metres wide and 20 metres long. Besides, there were wall gates and emergency doors in 20 places of the mountain fort.
One of the main features which can be found in the Taesongsan Fort is the construction of many bastions, defensive establishments that stuck out to keep the enemy from climbing up the walls, making it possible to raise the defensive capability of the fort to the maximum."
The scale of the Taesongsan Fort, a valuable legacy of the Korean nation, and its building technique alone, show the wisdom and talents of the diligent and resourceful people of Koguryo and part of its developed culture.
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