Stories of Korea’s National Treasures 72Photo Credit : Cultural Heritage Administration of KoreaDongguk Jeongun (Correct Rhymes of the Eastern Kingdom)(Joseon Dynasty, 1448)🏯 1. The First Official Guide to Korean PronunciationShortly after the creation of Hunminjeongeum, scholars of the Joseon Dynasty compiled Dongguk Jeongun, the first official Korean rhyme dictionary.Completed in 1448 under t..