King Sejong the Great was the fourth king of the Joseon Dynasty in Korea, ruling from 1418 to 1450. He is best known for his significant contributions to Korean culture and governance, particularly for promoting science, technology, and the arts. One of his most notable achievements was the creation of the Korean alphabet, known as Hangul, which made reading and writing accessible to the common people. His reign is often regarded as a golden age in Korean history, marked by advancements in agriculture, literature, and military technology.