Grand Princess Seongmok

Grand Princess Seongmok or shortly-called Princess Seongmok was a Goryeo royal family member as the daughter of King Taejo's 13th son, Wang Uk.
It was said that she would often go to the temple Hyeonhwasa to pray for her parents along with her half younger brother, Wang Sun. From this, Seongmok became the first Korean noblewoman who held the title of Janggongju which was later used by Yilianzhenbala and Jintong.
Although her detailed information was not recorded in Goryeosa, but in 1930 during the Japanese colonial period, her existence was made known through the Hyeonhwa Sabi which became the North Korean National Treasure Cultural Relic No. 151 and was discovered at Yeongchu Mountain, Pangyo-ri, Gaeseong-gun, Gyeonggi Province.