Joseon (Korean: 조선; hanja: 朝鮮; also Chosŏn, Choson, Chosun) was a Korean kingdom founded by Taejo Yi Seong-gye that lasted for approximately five centuries, from July 1392 to October 1897. It was founded following the aftermath of the overthrow of the Goryeo dynasty in what is today the city of Kaesong. Early on, Korea was retitled and the capital was relocated to modern-day Seoul (서울). The kingdom's northernmost borders were expanded to the natural boundaries at the Amnok and Duman (or Tumen) rivers through the subjugation of the Jurchens.