The Tomb of Emperor Dục Đức or the An Mausoleum (Vietnamese, An Lăng, 安陵) is a tomb complex in Huế in which are buried Dục Đức and his wife, his son Thành Thái, and 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 (mother of Duy Tân).
Duy Tân was buried in the tomb compound in 1987.
The mausoleum has two sections - the tomb itself and Long An shrine.