Crown Prince Sanggye or Crown Prince Wanpung was the crown prince of the Korean Joseon dynasty, an adopted son of Jeongjo of Joseon and biological child of Prince Euneon. His first name was Yi Jun, his changed name was Yi Dam, and his other name was Yi Shik. From 1776 to 1782, he was a leading remainderman during the early rule of Jeongjo. His posthumous epithet is unknown.
Life
Crown Prince Sanggye was born on January 21, 1769, in Hanseong. He was the son of Prince Euneon and his wife Lady Song of Sangsan, a daughter of Song Rak-hyu. His father was the son of Crown Prince Sado and his great-grandfather was King Yeongjo. During his early childhood, he was adopted by Jeongjo of Joseon by Hong Guk-yeong. His first name was Yi Jun. Beginning in June 1778, of Pungsan was a concubine of 22nd King Jeongjo. She was the sister of Hong Guk-yeong, a powerful kingmaker, and the fourth cousin once removed of Lady Hyegyong. At this time Ku Seon-bok was other some Joseon noble's was support to his heir to the throne; but as King Jeongjo was in his mid-20s, he could still be expected to produce an heir by another woman. Kim Jong-su, along with others of King Jeongjo's gentlemen, were enemies of Hong Guk-yeong, and demanded Hong Guk-yeong and Crown Prince Wanpung be punished. On May 7, 1779, Lady Hong Wonbin of Pungsan died suddenly, Kim Jong-su with other King Jeongjo's gentlemen repeatedly accused Hong Guk-Yeong and Crown Prince Wanpung. On September 26, 1779 Hong Guk-yeong was expelled from power and jailed. Crown Prince Wanpung was disenfranchised as heir to the throne and from the peerage. His title was changed from Wanpung to Sangkye. His name was also changed from Yi Jun to Yi Dam, but the King's retainers continued their attacks. On January 21, 1784, he was married to Lady Shin of Pyeongsan, a daughter of Shin-oh. On November 20, 1786, Crown Prince Sangkye suddenly died and was suspected to have been poisoned. Some accused Hong Guk-yeong or his original father Prince Euneon, or other some King Jeongjo's retainers. After his death, was buried at Yeonhul Gung castle, near modern Sinchon Station and Yonsei University. His funeral was personally arranged by his adoptive father, King Jeongjo. Crown Prince Sanggye was not reinstated for many years. In 1801, his mother Lady Song of Sangsan and his wife Lady Sin of Sangkye was executed for their belief inCatholicism. Thereafter, he was still not reinstated, because of his close family members' religious beliefs. He was eventually amnestied and rehabilitated on June 17, 1849, by the kingCheoljong of Joseon, who was his half-nephew.
