Queen Seondeok of Silla (606 – 8 January 647) was 27th ruler of Silla, one of the three ancient kingdoms of Korea. She was a daughter of King Jinpyeong and Lady Maya of the Kim clan. Because King Jinpyeong did not have any sons, Queen Seondeok became the first female ruler in Korean history after her father died. Besides the name Seondeok, she was also called Sung-Jo Hwang-Go which means "sacred and dedicated queen".