The pair of monuments was built during the mid-Fifth Dynasty, likely during Nyuserre Ini's reign, for two female members of the extended royal family.

Because of its unique architectural characteristics, such as the absence of mortuary temple, a funerary chapel located inside the monument superstructure and a north-south descending corridor to the burial chamber, the monument is seen as a distinct type of Ancient Egyptian tomb, called a "double pyramid" by the Egyptologist Miroslav Verner.

Since for a long time no intensive research was conducted, the structure was believed to be the pyramid of a queen of the 5th Dynasty, similar to Lepsius XXIV directly to the north, although preliminary investigations appeared to indicate that the funerary temple was located, unusually, on the western side of the structure.

[1] A Czech archaeological team led by Miroslav Verner conducted the first intensive excavation between 2001 and 2004, in which the unusual character of the structure as a "Double pyramid" became clear.

"[2] Dušan Magdolen questioned the classification of the building as a double pyramid and stressed the typological similarity of the remains to a mastaba.

Furthermore, some mastabas are known to have had a few architectural elements similar to those found in pyramids, in particular the north-south orientation of the descending corridor leading to the substructure as is the case here.

In addition to parts of a woman's remains, fragments of her limestone canopic jars and grave goods were found in the rubble of the chamber.

In the ruins of the tomb chamber, a very few traces of the burial of a woman were found, as well as a single object of the grave goods.

[2] Since no inscriptions have been found with the name of the owner of the pyramid, the unusual structure cannot yet be exactly dated, despite the intensive excavations which have now taken place.