Step Pyramid of Djoser at Saqqara, Egypt
Intended to hold his mummified body, Pharaoh Djoser's Step Pyramid at Saqqara began as a traditional, flat-roofed mastaba. But by the end of his 19-year reign, in 2611 B.C., it had risen to six stepped layers and stood 204 feet (62 meters) high. It was the largest building of its time.
