Egypt in the Old Kingdom (ca. 2649–2130 B.C.) – The Metropolitan Museum of Art https://www.metmuseum.org/essays/egypt-in-the-old-kingdom-ca-2649-2150-b-c
While the origin of many concepts, practices, and monuments can be traced to earlier periods, it was during the Old Kingdom that they developed into the forms that would characterize and influence the rest of pharaonic history.
, the Step Pyramid.