Taejo of Joseon (October 27, 1335 – May 24, 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.
Taejo's father Yi Ja-chun was a minor Mongol official, but his ethnicity was Korean.
Taejo's mother Queen Uihye was originally Chinese from the Yantai-Weihai area of Shandong.
Taejo joined the Goryeo army and rose through the ranks, seizing the throne in 1392.
He abdicated in 1398 during the strife between his sons and died in 1408.