The link in #4 is to the previous recent topic about pyramid construction, and jumps in at #63 of that topic,where I've managed to collect a pile of links there pointing to all of the possible construction methods (that I remembered or know about). BTW, the Great Pyramid, as well as all the others, were built as tombs, and used for tombs, but were looted in antiquity. The Valley of the Kings has dozens of tombs, some of which were completed, some abandoned, but only one made it to modern times unlooted. To say I was disappointed when I saw that both Robert Schoch and David Rohl have teamed up with the charlatan Bauval is an understatement.
Wow.
I thought the pyramids were all just tombs. But now, the question is, why build a pyramid to house a pump?