集賢殿
Koreans primarily wrote using Classical Chinese alongside native phonetic writing systems that predate Hangul by hundreds of years, including Idu script, Hyangchal, Gugyeol and Gakpil. However, many lower class Koreans were illiterate due to fundamental differences between the Korean and Chinese languages, and the large number of Chinese characters. To promote literacy among the common people, the fourth king of the Joseon dynasty, Sejong the Great, personally created and promulgated a new alphabet. Although it is widely assumed that King Sejong ordered the Hall of Worthies to invent Hangul, contemporary records such as the "Veritable Records of King Sejong" and Jeong Inji's preface to the "Hunminjeongeum Haerye" emphasize that he invented it himself.