The fifth king of the 2nd Dynasty was probably responsible for the unification of Upper and Lower Egypt. Not much is known about him, save the fact that he undertook massive military campaigns. A statue of him which resides in the Cairo Museum, demonstrates the first use of hard stone work during this period. He is responsible for the construction of a large granite door jamb within the temple of Hierakonpolis, and for the building of many of the mortuary complexes at both Saqqara and Abydos.