The Pyramid of Cheops was built in 2500 BC by a civilization that didn’t know the wheel nor the pulley, which has led to many theories over the last century. One of the most recent is the proposal by the French architect Jean-Pierre Houdin, who speculates that the pyramid was built by an internal spiral ramp.
Houdin presents in this documentary his research on this theory relying on computer graphics and lots of virtual reconstructions.
