Heungseon Daewongun (흥선대원군, 1820–1898) or The Daewongun (대원군), Guktaegong (국태공, "The Great Archduke") or formally Heungseon Heonui Daewonwang (흥선헌의대원왕) and also known to contemporary western diplomats as Prince Gung, was the title of Yi Ha-eung, regent of Joseon during the minority of Emperor Gojong in the 1860s and until his death a key political figure of late Joseon Korea.