The Great Pyramid

The entrance to the Great Pyramid, Giza, Egypt, 2580-2560 BC

The original entrance to the Great Pyramid of Giza is on the north face, about 56 vertical feet above ground. Built by the 4th Dynasty Egyptian Pharaoh Khufu (Cheops) between 2580-2560 BC, the Great Pyramid is the oldest and largest of the three pyramids in the Giza pyramid complex. It is also the oldest and only remaining  Seven Wonders of the Ancient World. For over 3,800 years it was the tallest man-made structure in the world at 146.5 metres (481 feet). The Great Pyramid consists of an estimated 2.3 million blocks of limestone and granite weighing more than 5.5 million tons. Originally, the Great Pyramid was cased in polished white limestone that formed a smooth outer surface; little remains of the casing. Today, only the underlying stepped core can be seen.

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