Korean historical figures have played significant roles in shaping the country's culture and history. Notable figures include King Sejong the Great, who created the Korean alphabet, Hangul, in the 15th century, making literacy more accessible to the common people. Another important figure is Admiral Yi Sun-sin, known for his naval victories against Japan during the Imjin War in the late 16th century. In addition to these leaders, Queen Seondeok of Silla was one of the first female rulers in East Asia, known for her intelligence and contributions to science and culture. Kim Il-sung, the founder of North Korea, is also a significant figure, shaping the political landscape of the Korean Peninsula in the 20th century.