Pyramids
 Great Pyramid (2560 BC) 43,200 seconds = 12 hours (half a day) 43,200 x 3000 ft = earth circumference 43,200 x 481 ft = earth polar radius |
 King Khufu (2589 - 2566 BC) |
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 Khafre Pyramid (2500 BC) |
 King Khafre (2558 - 2532 BC) |
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 Menkaure Pyramid (2510 BC) |
 King Menkaure (2532 – 2503 BC) |
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 Bent Pyramid (2465 BC) |
 King Sneferu (2575 – 2465 BC) |
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 Red Pyramid (2563 BC) |
King Sneferu (2575 – 2465 BC) |
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 Step Pyramid (2611 BC) |
 King Djoser (2630 – 2611 BC) |
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