Sejong the Great was the fourth king of the Joseon Dynasty in Korea, reigning from 1418 to 1450. He is best known for his significant contributions to Korean culture and governance, particularly the creation of the Korean alphabet, known as Hangul. This writing system made literacy more accessible to the common people, promoting education and communication. In addition to his linguistic achievements, Sejong was a patron of science and technology. He supported advancements in agriculture, astronomy, and military innovations, which helped strengthen the nation. His reign is often regarded as a golden age in Korean history due to these transformative developments.