The building remained unfinished, and it is still unknown which pharaoh was really intended to be buried here since no appropriate inscription has been found.

The pyramid was rediscovered in 1910 by Ernest Mackay and excavated in the following year by Flinders Petrie.

Subsequently, the northern pyramid was attributed to the female-pharaoh Sobekneferu, sister of Amenemhat IV and last ruler of the 12th Dynasty.

After the third chamber, a stairway and then a corridor leads to the antechamber just prior to the large burial chamber: this room, partially covered by an inverted V-shaped ceiling, is entirely filled by a huge sarcophagus-vault, which was carved from a single block of quartzite.

Only a large portion of the causeway has been discovered, as well as another blocking stone, likely abandoned due to a change of the pyramid's design.