Hangul supremacy
Hangul supremacy is the belief, most widespread in Korea, that the Hangul alphabet developed by King Sejong the Great's Hall of Worthies in 1443 is the simplest, most logical, most beautiful and most scientific of the world's writing systems. In its extreme form, the belief holds that Hangul is in fact best suited for the expression of sounds in all languages.
Korean literature
Sijo and gasa are closely linked to the development of hangul in the early Joseon period. As hangul was created, "akjang" was developed as a way to note musical scores using the Korean script. King Sejong himself is credited with a compilation of Buddhist songs.