"In ancient Egyptian history, the Old Kingdom is the period spanning c. 2686–2181 BC. It is also known as the "Age of the Pyramids" or the "Age of the Pyramid Builders", as it encompasses the reigns of the great pyramid builders of the Fourth Dynasty— among them King Sneferu, who perfected the art of pyramid-building, and the kings Khufu, Khafre and Menkaure, who constructed the pyramids at Giza. Egypt attained its first sustained peak of civilization during the Old Kingdom—the first of three so-called "Kingdom" periods (followed by the Middle Kingdom and New Kingdom) which mark the high points of civilization in the lower Nile Valley." - (en.wikipedia.org 16.10.2019)
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