[Sherman Logan]

FWIW, the Old Kingdom ran from c. 2700 to c. 2200.

The great pyramids were built during the 2500s.

So they were roughly 300 years old when this period came along.

To put that in some perspective, B. Franklin was born 306 years ago.

[norwaypinesavage]

Some believe the Egyptian Chariots circa King Tut, were engineering feats that exceeded the pyramids. Here's one such article: http://news.discovery.com/history/king-tut-chariot.html