Ki Ch'ŏl

Ki Ch'ŏl (; died June 16, 1356), also known by his Mongolian name Bayan Buka, was a political figure and nobleman in the late Goryeo dynasty. After his younger sister, Empress Gi who was the wife of Toghon Temür giving birth to a prince, Ki Ch'ŏl was then honoured as Internal Prince Deokseong.

Ki received a government post from the Yuan dynasty and appointed as the Grand Minister of Education or da situ in 1340. In 1353, Ki was appointed as a manager of the Liaoyang Branch Secretariat. Since the Haengju Ki clan was regarded as a powerful family in Goryeo, he was given preferential treatment with or equal to that of the Goryeo ruler during his stay in Yuan. On June 16, 1356, Ki was invited to a palace banquet by King Gongmin himself, but as soon as he entered it, the king accused him and Kwŏn Kyŏm, both members of the pro-Yuan faction, of plotting treason and conspiracy, and they were arrested and executed them on the spot. Ki Yu-gŏl and Öljei Buka were also killed by the king's orders. This event is present-day known as "Byeongsin coup" in Korean history.

Family Father: Ki Cha-o Mother: Grand Lady Yeongan of the Yi clan , also known as Wangzai Han Khatun. Older brother: Ki Sik Younger brother: Ki Wŏn, Prince Deokyang Nephew: Öljei Bukha Younger brother: Ki Chu Younger brother: Ki Yun Younger sister: Empress Gi – married Emperor Huizong of Yuan. Nephew: Emperor Zhaozong of Yuan Children(s): 1st son: Ki Yu-gŏl (기유걸; d. 1356) 2nd son: Ki In-gŏl 3rd son: Ki Se-gŏl 4th son: Ki Sayin-Temür 5th son: Ki Sayin-Buqa (기새인불화; d. 1356) A daughter who married Wang Chung-gwi

In popular culture Portrayed by Kim Yoon-hyung in the 1983 KBS TV series Foundation of the Kingdom. Portrayed by Lee Dae-yeon in the 2005–2006 MBC TV Series Shin Don. Portrayed by Yu Oh-seong in the 2012 SBS TV series Faith.