The Tomb of Emperor Dục Đức, officially the An Mausoleum is a tomb complex in Huế, Vietnam, in which are buried Dục Đức and his wife, his son Thành Thái, his grandson the child-emperor Duy Tân, and several other members of Vietnam's last dynasty, the Nguyễn dynasty, such as the queen mother Nguyễn Thị Định.