Prince Kwagpeoung

Duke Gwangpyeong (; 1083–1170), personal name Wang Won was a Goryeo royal family member as the grandson of King Munjong. He was also a politician and physician who was firstly honoured as Count Gwangpyeong.

Biography Early life and relative Born as the second son of Wang Do, Duke Joseon who was the eldest son of King Munjong and Consort Ingyeong in 1083, he was named Won . His mother was the second daughter of Yi Jeong from the Incheon Yi clan. He had an older brother and a younger brother who would become the father of Queen Janggyeong, Queen Uijeong, and Queen Seonjeong.

Role in the royal court In 1086 (3rd years reign of King Seonjong), Wang Won was appointed as Geomgyosagongjuguk and later became Euncheonggwangnokdaebu and Sutaebu .

During the reign of King Sukjong, Wang Won became Geomgyosaso Susagong and Suchunggongsin Teukjingeomgyotaewi Susado in 1103. He also received Sukjong's 3rd daughter, Princess Ansu as his wife, honoured as Count Gwangpyeong and promoted into Gaebuuidongsamsa in 1111 (6th years reign of King Yejong). Together, they had a son who would marry Yejong's 2nd daughter, Princess Heunggyeong.

During the reign of King Injong, Wang Won became Marquess Gwangpyeong and later the Duke Gwangpyeong while held the position of Sutaebo .

Role in religion and medicine During his lifetime, Wang Won was said to well versed in both of Confucianism and Buddhism, excellent in medicine and used his ability to widely take care and treat peoples. From a middle age, he fascinated with Buddhism and always read the Lotus Sutra , which believed that he kept nearly 10,000 copies in his own mansion.