age of Joseon dynasty as "Hwangok", which indicates the law was highly preserved more than a thousand years. Death and succession Though Gogukcheon ascension signaled a change from fraternal succession to father-son succession by primogeniture, he was succeeded by his brother Sansang. Gogukcheon's posthumous name was derived from his burial area, Gogukcheon-won (고국천원). See also History of Korea Three Kingdoms of Korea List of Korean monarchs References Goguryeo rulers 197 deaths 2nd-century births 2nd-century monarchs in Asia 2nd-century Korean people