Heungseon Daewongun
When the 100 mun denomination ("Dangbeakjeon" or "Tangbeakjeon", /) was introduced in 1866 by regent Heungseon Daewongun to finance the state's military expenditures to strengthen Korea's military power to be able to compete with that of the Western powers which were forming an ever growing threat, as well as to rebuild the Gyeongbok Palace.