Crown Prince Sado

Crown Prince Sado, personal name Yi Seon, also known by his temple name King Jangjo, was the second son of King Yeongjo, the 21st monarch of Joseon, and the biological father of King Jeongjo. Due to the prior death of his elder half-brother, Crown Prince Hyojang, he was the probable future monarch. However, at the age of 27, he died, most likely of dehydration and possibly of starvation, after being confined in a rice chest in the heat of summer at the order of his father. Following the establishment of the Korean Empire, he was honored as Emperor Ui.²