Taejo of Joseon (October 27, 1335 – June 18, 1408), born Yi Seong-gye, whose changed name is Yi Dan, was the founder and the first king of the Joseon Dynasty of Korea reigning from 1392 to 1398, and the main figure in overthrowing the Goryeo Dynasty. He was posthumously raised to the rank of Emperor in 1899 by Gojong, the Gwangmu Emperor, who had proclaimed the Korean Empire in 1897.Taejo's father Yi Ja-chun was a minor Mongol official, but his ethnicity was Korean.