Bukhansanseong Fortress

Bukhansanseong
Bukhansan National Park, Gyeonggi-do/Seoul, Republic of Korea
Bukhansanseong Fortress
Type	Korean castle
Height	7m
Site history
Built	Year 1711
Built by	Sukjong of Joseon
Materials	Granite, wood

The Bukhansanseong (Korean: 북한산성, "fortress of the mountains north of the Han") is a fortress located in Gyeonggi-do and Seoul, South Korea, dating back to the middle Joseon period. The present fort was completed in 1711, though plans for the structure date back to 1659. The name is also given to a fortress mentioned in the Samguk Sagi, constructed by Gaeru of Baekje in 132 CE, and the two are often conflated although the putative connection is contested.

The modern Bukhansanseong was built to protect the approach to Seoul, filling a gap in Korea's defences that had become apparent during the second Manchu invasion of 1636 and the earlier Imjin War. The Bukhansanseong was used as a royal retreat in emergencies, and contains 120 rooms.

It was first built in 132 CE by Gaeru of kingdom of Baekje. During Baekje era, this fortress was used for the defense of the capital when Baekje set up its capital at Wiryeseong Fortress in Hanam.

The current Bukhansanseong Fortress was built in 1711 CE by King Sukjong of Joseon. After the Japanese invasions of Korea (1592–98) and Second Manchu invasion of Korea(1636), fierce discussion broke out in the royal court about constructing fortress that can protect the kingdom against external threats. Although discussion about building new fortress began in 1451 CE during the era of king Munjong of Joseon, Actual construction of the Bukhansanseong Fortress began on 3 April, in 1711 during 37th year of King Sukjong of Joseon. The construction of Bukhansanseong Fortress was relatively faster than discussion and planning period. 12.7 km of Fortress outer wall was built just in 6 month time (October in 1711). Haeng-gung (Korean: 행궁, Temporary Palace), was built in May 1712, and Jong-seong-mun, (Korean: 중성문), which was built to protect inner fortress and essential facilities, such as Haeng-gung or jung-heung-sa (Korean: 중흥사), was finished in 1714.