Joseon (July 1392 - August 1910) (also Chosŏn, Choson, Chosun), was a sovereign state founed by Taejo Yi Seong-gye in what is modern day Korea, and lasted for approximately five centuries. It was founded in the aftermath of the overthrow of the Goryeo Kingdom at what is today the city of Kaesong. Early on, Korea was retitled and the capital was relocated to modern-day Seoul and the kingdom's northernmost borders were expanded to the natural boundaries at the Amnok and Duman rivers (through the subjugation of the Jurchens). Joseon was the last royal and later imperial dynasty of Korean history. It was the longest ruling Confucian dynasty. After declaring the Korean Empire in 1897, the dynasty ended with Japanese annexation in 1910.