Grand Prince Uian (1382–1398)
| Yi Bang Seok 이방석 | |
|---|---|
| Crown Prince of Joseon | |
| Tenure | 7 September 1392 – 6 October 1398 |
| Successor | Crown Prince Bang-gwa |
| Born | 1382 Gaegyeong (now Kaeseong, Kaesong Industrial Region), Goryeo |
| Died | 6 October 1398 (aged 16–17) Hanseong, Joseon |
| Burial | |
| Spouse | Deposed Crown Princess Consort Hyeon of the Ryu clan
(died 1393)Crown Princess Consort Hyeon of the Cheongseong Shim clan
(m. 1397–1398) |
| Issue | Yi Won-sun |
| Father | Taejo of Joseon |
| Mother | Queen Sindeok |
| Grand Prince Uian | |
| Hangul | 의안대군 |
|---|---|
| Hanja | 宜安大君 |
| Revised Romanization | Uiandaegun |
| McCune–Reischauer | Ŭiandaegun |
| Birth name | |
| Hangul | 이방석 |
| Hanja | 李芳碩 |
| Revised Romanization | I Bangseok |
| McCune–Reischauer | Yi Bangsŏk |
Prince Uian (Korean: 의안대군; Hanja: 宜安大君; 1382 – 26 August 1398) was a Korean crown prince. He was the eighth and youngest son of King Taejo and the first crown prince of Joseon.
His birth name was Yi Bang-seok (이방석, 李芳碩). He was posthumously named Sodo (소도, 昭悼) with the nickname of Deposed Crown Prince Yi Bang-seok (폐세자 이방석, 廢世子 李芳碩) and posthumous title of Prince Sodo (소도군, 昭悼君).
As the child of King Taejo's second wife, Queen Sindeok, he was appointed as the first crown prince of the Joseon Dynasty. He was deposed during the First Strife of Princes and assassinated at age 17.