In 1314
King Chungseon passed the throne to his son King Chungsuk. In 1321 King Chungsuk fathered his son
King Chunghye. This prompted the previous crown prince of Goryeo,
Öljeyitü, to establish an alliance with Emperor
Sidibala, and King Chungsuk was thus interned in 1321. However, Sidibala was assassinated in 1323 and Öljeitü's plan was aborted. King Chungsuk, who was allowed to return to Goryeo in 1325, passed the throne to King Chunghye in 1330 but was reinstated after two years because King Chunghye was deposed by
Yuan dynasty. Letters uncovered from the Vatican potentially suggest that the first contacts between the
Vatican and Korea began during Chungsuk's reign, 261 years before Spanish Catholic priest
Gregorio de Céspedes visited
Joseon, the successor state of Goryeo, though some Korean researchers believe the letters could potentially have been forgeries. On December 13, 1335, after having a dream, the King changed his personal name from To () to Man (). King Chungsuk died in 1339. ==Family==