It was erected on leveled ground and composed of a mudbricks core covered with a casing of white Tura limestone blocks resting on foundations.

It was first excavated in 1894 by the French Egyptologist Jacques de Morgan, who managed to reach the burial chamber after discovering a tunnel dug by ancient tomb robbers.

The original project included the main pyramid along with a northern chapel and a small eastern mortuary temple, all surrounded by an enclosure wall.

[5] From the entrance, located on the western side of the pyramid, a long descending hallway led to an antechamber which connects a storeroom on the west wall to the king's chamber on the east wall, the latter made from granite and provided with a granite sarcophagus on the western side, and a niche for the canopic chest on the southern one.

It is possible that Senusret III was never buried there and that he might have preferred his Abydene tomb as his final resting place, as suggested by the lack of a blocking system within this hypogeum.