The Pyramid of Ameny Qemau is located in southern Dahshur. It was constructed c. 1790 BC for Ameny Qemau, the 5th king of the 13th Dynasty during the Second Intermediate Period. The stone constituting its upper structure has been entirely robbed but the damaged substructures remain. The pyramid was discovered by Charles Arthur Musès in 1957 and excavated in 1968. The pyramid originally stood 35 metres (115 ft) high with a base length of 52 metres (171 ft).