Korean heavenly prince, son of Hwanin; descended from heaven to Mt. Taebaek (or Mt. Baekdu) with three heavenly seals (bell, mirror, sword) and 3,000 followers, establishing the sinsi ("divine city") at the sacred sandalwood tree (Sindansu). Established 360 affairs of human life — agriculture, lifespan, illness, punishment, good and evil — making him the foundational civilizing deity of Korean tradition. Transformed a bear into the woman Ungnyeo (after her 100-day cave-vigil with mugwort and garlic) and took human form to marry her; their son was Tangun, founder of Gojoseon. The hongik-ingan principle ("broadly benefiting humanity") associated with Hwanung is enshrined in modern South Korean educational law as a foundational national value. Worshipped as the second member of the Hwanin-Hwanung-Tangun trinity in modern Daejongism.