Taejo of Joseon (4 November 1335 – 27 June 1408), born Yi Seong-gye (Korean: 이성계), was the founder and first ruler of the Joseon dynasty of Korea. After ascending to the throne, he changed his name to Yi Dan (Korean: 이단), and reigned from 1392 to 1398. He was the main figure in the overthrowing of the Goryeo dynasty. Taejo abdicated in 1398 during a strife between his sons and died in 1408. When Taejo became king, he emphasized continuity over change. No new institutions and no massive purges occurred during his reign. The dynasty that he established was mostly dominated by the same ruling families and officials that had served the previous regime. He re-established amicable relations with Japan and improved relations with Ming China.

Taejo of Joseon - Wikipedia