Sejong of Joseon (15 May 1397 – 8 April 1450), personal name Yi Do (Korean: 이도; Hanja: 李祹), widely known as Sejong the Great (Korean: 세종대왕; Hanja: 世宗大王), was the fourth ruler of the Joseon dynasty of Korea. Initially titled Grand Prince Chungnyeong (Korean: 충녕대군; Hanja: 忠寧大君), he was born as the third son of King Taejong and Queen Wongyeong. In 1418, he was designated as heir after his eldest brother, Crown Prince Yi Je, was stripped of his status. Today, King Sejong is regarded as one of the greatest leaders in Korean history.
