Lady Yeonchang of the Gyeongju Choi clan (Korean: 연창궁부인 최씨; Hanja: 延昌宮夫人 崔氏) was the third wife of King Seongjong of Goryeo[2] and the mother of Queen Wonhwa.
[3] She came from Gyeongju, Gyeongsang Province as the daughter of Confucianism Scholar Choi Haeng-eon.
During King Seongjong's reign, he changed the past traditional political structure and actively introduced the Confucian political system to improve the national system.
Around 1017, her son-in-law gave his 2nd wife's maternal families, the Gyeongju Choi clan royal titles and ranks, and Choi then known as Grand Lady of the Nakrang County (낙랑군대부인; 樂浪郡大夫人).
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