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. Archaeologists are generally of the opinion that it belongs to the early or the mid-4th Dynasty (2613–2494 BC) 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.