King Sejong the Great (15 May 1397 to 8 April 1450 CE) ruled Korea from 1418 to 1450 CE as the fourth king of the Joseon Dynasty (also spelled Choson). One of only two Korean kings called 'the Great' today, Sejong had a major impact on Korea and Koreans. His greatest achievement was creating Hangul, the Korean alphabet, but his patronage of science, technology, literature, and medicine all had a large impact on Korea and Koreans.
This is a companion discussion topic for the original content at https://www.worldhistory.org/Sejong_the_Great/.