Chungsuk (30 July 1294 – 3 May 1339), personal name Wang Man (Korean: 왕만; Hanja: 王卍), né Wang To (Korean: 왕도; Hanja: 王燾), also known by his Mongolian name Aratnashiri (阿剌忒訥失里),[1] was the 27th king of the Goryeo Dynasty of Korea, reigning from 1313 to 1330 and again from 1332 to 1339.
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.
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.
[2][3] On December 13, 1335, after having a dream, the King changed his personal name from To (도; 燾) to Man (만; 卍).