Queen Sinmyeong of the Chungju Yu clan[2] (Korean: 신명왕후 유씨; Hanja: 神明王后 劉氏) or long-called as Queen Sinmyeongsunseong (Korean: 신명순성왕후; Hanja: 神明順成王后; lit. Sinmyeong, the Accomplishment and Holy Queen) was the third Goryeo queen consort through her marriage as the third wife of Wang Geon, its founder and become the mother of his 5 sons (include Jeongjong and Gwangjong) and 2 daughters.[3][4]
During Taejo's lifetime, she was addressed as Grand Lady Chungjuwon (충주원대부인; 忠州院大夫人; "Grand Lady of the Chungju Courtyard"). Then, during their sons' reign, she was addressed as Queen Mother Sinmyeongsunseong (신명순성태후; 神明順成太后) and Grand Queen Mother Sinmyeongsunseong (신명순성왕태후; 神明順成王太后). She was the first woman whom Wang Geon met after his ascension to the throne and became the first one who held the position of "Queen Mother" and "Grand Queen Mother" of Goryeo.
Lee Eun-shik (2009). 불륜의 왕실사: 베개 밑에서 발견한 뜻밖의 역사 [The Royal History of Adultery: The Unexpected History Found Under the Pillow] (in Korean). Taoreum. ISBN9788996200857. Retrieved June 26, 2021.