Djoser's trusted vizier, Imhotep, oversaw the construction of the king's pyramid during the 27th century B.C. The Step Pyramid of Djoser is the core of the ancient Saqqara complex. Design plans for the pharaoh's pyramid were massive; Imhotep planned the construction of a 197-foot pyramid featuring a six-stack terrace of steps over the structure's burial shaft tomb which was made 92 feet deep and 23 feet wide.. According to the official version, it was built by the scientist and architector Imhotep. Yet, this was not the first pyramid that was built by the ancient Egyptians. He built it for his master, the king of Upper and Lower Egypt - Djoser Nechericheta. The Step Pyramid of Djoser (also spelled Zoser) is the earliest monumental pyramid in Egypt, built at Saqqara about 2650 BCE for the 3rd Dynasty Old Kingdom pharaoh Djoser, who ruled about 2691–2625 BCE (or perhaps 2630-2611 BCE). The Great Pyramid of Khufu in Giza is arguably the most famous of all pyramids in Egypt, or in the world for that matter. The Pyramid of Djoser is considered to be the first Pyramid in the history of mankind. An earlier Egyptian pyramid was built 4,600 years ago in Saqqara for a 3 rd Dynasty pharaoh Netjerikhet, commonly known as Djoser.