단군, also known as Dangun, is a legendary figure in Korean history and mythology. He is traditionally regarded as the founder of the first Korean kingdom, Gojoseon, around 2333 BCE. According to legend, he was born from the union of Hwanin, the Sky God, and a bear-woman, symbolizing the origins of the Korean people. The story of 단군 is significant in Korean culture, representing the nation's identity and heritage. His founding of Gojoseon is celebrated in various festivals and is an important part of Korean folklore. The day of his founding is commemorated as National Foundation Day in South Korea.