Castles in South Korea Codexery

Busosanseong

Baekje fortress protecting the final capital Sabi.

Busosanseong (부소산성; 扶蘇山城) is a fortress from the Baekje period, located on Busosan mountain in present-day Buyeo County, South Chungcheong Province, South Korea. Constructed in 538 by the Korean calendar, it may have replaced an earlier fortification on the same site, serving to defend Sabi, the final capital of Baekje. The site was listed as Historic Site of South Korea No. 5 on January 21, 1963. Remains of three main gates and a military depot have been identified.

Among the notable finds at Busosanseong is a stone stele marking the founding of a Buddhist temple by Sataek Ji-jieok, a high-ranking official under King Uija (r. 641–660), the last ruler of the Baekje dynasty. On October 13, 2025, the National Research Institute of Cultural Heritage in Buyeo reported the discovery of a Baekje-era ice warehouse. This pit measures 7 by 8 meters across and 2.5 meters deep, forming a square with a U-shaped interior. Its walls are cut from bedrock, with later stone additions to improve drainage. Inside the structure, a small jijingu jar was found buried, likely placed at the start of construction as an offering to the local land deity. The jar contained five Chinese wushu coins.

Quick Facts

Built
538 (Korean calendar)
Location
Buyeo County, South Chungcheong Province, South Korea

Facts from the source article.

Lore & Background

Busosanseong was built in 538 (Korean calendar) on Busosan mountain, possibly replacing an earlier fortification, to defend the Baekje capital Sabi. The fortress includes traces of three main gates and a military depot. A stone stele found at the site commemorates the foundation of a Buddhist temple by Sataek Ji-jieok, a prominent official who served under King Uija (r. 641-660), the last Baekje ruler.

Reader's Guide

Busosanseong is significant as a key defensive structure of the Baekje kingdom during its final period, protecting the capital Sabi. Its designation as Historic Site No. 5 in 1963 underscores its national importance. The discovery of a stone stele linked to Sataek Ji-jieok provides insight into the religious and political life of the late Baekje court. In 2025, the National Research Institute of Cultural Heritage in Buyeo announced the discovery of a Baekje-era ice warehouse within the fortress, a square pit 7 by 8 meters wide and 2.5 meters deep with a U-shaped interior, built of bedrock with later stone drainage additions. A small jijingu jar containing five Chinese wushu coins was found buried inside as an offering to the local land deity. This find illuminates Baekje engineering and ritual practices.

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