Heb Sed
The purpose of the pyramid is under debate by scholars. Some possible explanations are that it is for the king's Ka, or it represents the king as the ruler of Upper Egypt, or it is for the viscera of the King, or it is a dummy room for the Sed festival, or it has a solar function. Zahi Hawass, who led the uncovering of the pyramid, believed that the satellite pyramid was used symbolically as a changing room for the Sed festival.