Known rulers, in the History of Egypt, for the Sixth Dynasty. The Third, Fourth, Fifth and Sixth Dynasties of ancient Egypt are often combined under the group title, Old Kingdom. The Sixth Dynasty of Egypt is considered by many authorities as the last dynasty of the Old Kingdom of Ancient Egypt, although The Oxford History of Ancient Egypt (ed. Ian Shaw, 2000) includes the Seventh Dynasty and Eighth Dynasty as part of the Old Kingdom. Manetho writes that these kings ruled from Memphis, or Egyptian Mennefer, taken from the name of the pyramid of Unas which was built nearby; archeologists concur with Manetho on this.