Queen Gyeongseong of the Gyeongju Kim clan (Korean: 경성왕후 김씨; Hanja: 敬成王后 金氏; 1015 – 23 September 1086[1]) was a Goryeo princess as the only daughter of King Hyeonjong and Consort Wonsun who became a queen consort through her marriage with her younger half-brother, King Deokjong as his second (formally as first and primary) wife.
Lady Wang was born in 1015 as the only daughter of Royal Consort Wonsun of the Gyeongju Kim clan and King Hyeongjong of Goryeo.
When still a child and royal princess, she was called Oldest Daughter of the Gyeongheung Residence (Korean: 경흥원 장녀; Hanja: 景興院 長女) since it was her mother's official residence.
During her widowed life, she saw the reigns of four monarchs: Jeongjong, Munjong, Sunjong, Seonjong.
She was later buried in Jilleung (질릉; 質陵) alongside her late husband[5] when she died in 1086, and received her posthumous name in 1096.