Hall of Worthies
Sejong the Great, the fourth king of the Joseon dynasty, personally created Hangul and revealed it in 1443. Afterward, King Sejong wrote the preface to the Hunminjeongeum (the original treatise on Hangul), explaining the origin and purpose of Hangul and providing brief examples and explanations, and then tasked the Hall of Worthies to write detailed examples and explanations. The head of the Hall of Worthies, Jeong In-ji, was responsible for compiling the Hunminjeongeum. The Hunminjeongeum was published and promulgated to the public in 1446.