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Constructed in the 26th and 25th centuries B.C. (roughly 2600 B.C. – 2400 B.C.), the Egyptian pyramids of Khufu, Khafre and Menkaure, built in that order, are a testament to ancient planning and engineering.

The precise years that they were built is somewhat unclear, as those dates depend on when exactly the pharaohs who built them reigned, which is a subject of debate among scholars. For instance, the Metropolitan Museum of Art dates the reign of Khufu as being ca. 2551–2528 B.C., Khafre as being ca. 2520–2494 B.C. and Menkaure’s as being ca. 2490–2472 B.C. However, different sources and scholars have different estimates for when each pharaoh reigned.

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