Unfinished Northern Pyramid of Zawyet El Aryan

The Unfinished Northern Pyramid of Zawyet El Aryan, also known as Pyramid of Baka and Pyramid of Bikheris is the term archaeologists and Egyptologists use to describe a large shaft part of an unfinished pyramid at Zawyet El Aryan in Egypt. It is dated by mainstream scholars to the early or the mid-4th Dynasty during the Old Kingdom period. The pyramid owner is not known for certain and most Egyptologists, such as Miroslav Verner, think it should be a king known under his hellenized name, Bikheris, perhaps from the Egyptian Baka. On the contrary, Wolfgang Helck and other egyptologists doubt this attribution.

Source: Wikipedia