Taejo of Joseon
Taejo of Joseon (October 27, 1335 – May 24, 1408), born Yi Seong-gye (middle Korean: Ni Syeong-gye (니셩계), modern Korean: Yi Seong-gye (이성계)) was the founder and first King of the Joseon Dynasty of Korea. After ascending to the throne, he changed his name to Yi Dan (middle Korean: Ni Tan (니단), modern Korean: Yi Dan (이단)). He reigned from 1392 to 1398, and was the main figure in the overthrowing of the Goryeo Dynasty.