Heungseon Daewongun was the title of Yi Ha-eung, the regent of Joseon during the minority of Emperor Gojong in the 1860s. Until his death, he was a key political figure of late Joseon Korea. He was known simply as the Daewongun, Guktaegong, or later Grand Internal Prince Imperial Heonui ; he was also known to contemporary western diplomats as Prince Gung.