| Queen Sinseong 신성왕후 | |
| Queen Dowager Sinseong (신성왕태후, 神成王太后)[1] | |
| Birth Date: | 900 |
| Birth Place: | Gyeongju, North Gyeongsang Province |
| Death Place: | Kaeseong, Kaeseong Industrial Region, North Korea |
| Burial Place: | Jeongneung tomb, Gaeseong-si, North Hwanghae Province[2] [3] |
| Spouse: | Taejo of Goryeo (m. 918) |
| Issue: | Anjong of Goryeo[4] |
| Regnal Name: | Lady Daeryangwon (대량원부인, 大良院夫人; disputed) |
| Posthumous Name: | Sinseong (신성, 神成; "Divine and Constructive") |
| House: | Gyeongju Kim (by birth) Kaeseong Wang (by marriage) |
| Father: | Kim Eok-ryeom[5] |
Queen Sinseong[6] (; 900–?) or formally called as Queen Dowager Sinseong was a Silla royal family member as the first cousin of King Gyeongsun[7] who became the fifth wife of Taejo of Goryeo and the mother of Anjong of Goryeo,[8] also the grandmother of Hyeonjong of Goryeo which she later posthumously honoured as queen in 1010 under his command.
In November 935, when King Gyeongsun expressed his intention to surrendered Silla to Goryeo, Taejo sent an envoy in return this request.[9] Taejo also wanted to married with Silla's royal member and Gyeongsun said:
"Our Uncle, Kim Eok-ryeom has a daughter that both of her virtue and appearance are beautiful."
"우리 백부(伯父), 김억렴(金億廉)에게 딸이 있어 덕(德)과 용모가 쌍미(雙美)한지라 이가 아니면 내정(內政)을 구비(具備)할 수 없을 것."[10]
After this, Gyeongsun sent his older first cousin, Lady Kim to Goryeo and become the 5th wife of Taejo.[11]
Queen Sinseong was the great-great-great-granddaughter of King Munseong and the daughter of Kim Eok-ryeom, who was the uncle of King Gyeongsun, making her King Gyeongsun's first cousin.[12]