[K-Geography] Goryeo Dynasty relics discovered

This photo, provided by the National Research Institute of Maritime Cultural Heritage on Dec. 6, 2022, shows whetstones, part of 356 artifacts dating back to Goryeo Dynasty (918-1392), found under the sea off Gunsan, 275 km southwest of Seoul, in an excavation work since April. (PHOTO NOT FOR SALE) (Yonhap)

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