1,500-Year-Old Daegu Fortress Reveals Secrets After Major Excavation

For the first time in 1,500 years, the ancient fortress of Daegu Dalseong is revealing its secrets. A meticulous excavation, commissioned by the Daegu Metropolitan City, is bringing to light the true nature of this significant historical site, which dates back to the Three Kingdoms period. The findings are set to be unveiled to the public through an on-site explanation session, offering a rare glimpse into the past.

Historical records, such as the Samguk Sagi, indicate Dalseong was constructed in 261 AD as a strategic stronghold for Silla's control over the Daegu region. What makes this fortress particularly remarkable is its preservation of its original form, positioning it as a rare ancient fortification comparable to Gyeongju Wolseong in its significance for understanding the power dynamics of the Daegu region during the Three Kingdoms era.

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This investigation has yielded significant results by archaeologically clarifying the construction period and structure of Dalseong.

Contrary to previous assumptions that Dalseong was solely an earthen wall, the excavation has uncovered a sophisticated construction method employing a mix of earth and stone. The scale is impressive, with the lower width measuring 35 meters and the inner and outer walls reaching heights of approximately 9 and 17 meters, respectively. This complex engineering, utilizing local materials and advanced techniques for its time, including the use of earth-filled sacks (tonang) and a distinct section-based construction approach, allowed the fortress to withstand the ravages of time. Evidence of repairs from the Goryeo and Joseon dynasties further attests to its enduring importance as a regional center.

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We will continue with further investigations and research to preserve and utilize Dalseong as a cultural heritage that showcases Daegu's historical identity.