Mongch'ont'osŏng

Mongch'ont'osŏng (Korean: 몽촌토성; Hanja: 夢村土城) is an ancient earthen rampart dating from the Baekje period.^[1] It is located what is now in the Olympic Park of Seoul, South Korea.

Mongch'ont'osŏng
The former site of Mongchontoseong (2011)
Location	Seoul, South Korea
Coordinates	37°31′18″N 127°7′22″E
Historic Sites of South Korea
Official name	Mongchontoseong Earthen Fortification, Seoul
Designated	1982-07-22
Reference no.	297
Korean name
Hangul	몽촌토성
Hanja	夢村土城
Revised Romanization	Mongchontoseong
McCune–Reischauer	Mongch'ont'osŏng

The fortification walls are estimated to have been about 2.7 km (1.7 mi) in length and approximately 6 to 7 m (20 to 23 ft) high. The fortifications of Mongch'ont'osŏng had a palisade atop the wall and a moat surrounding its base. They are part of Wiryeseong with Pungnaptoseong.

During the 1988 Summer Olympics, the running section of the modern pentathlon was held there.^{[citation needed]} A number of important excavations of the site were conducted prior to the construction of the nearby Olympic Park.^[1]