There are several bits and pieces i myself have which i so far not yet able to put together (with the above posts) in an organised quality post.
I will just throw two in for now.
Not sure if you have already seen/heard it but a couple of years ago i noticed that the 3 pyramids of Sipan seemingly look similar to the 3 pyramids of Giza/Gizeh/er-ges-her. (Atlantis city = Tiwanaku/Tiahuanaco.) Not sure whether this is only use re the Giza pyramid/s date?
The name er-ges-her means beside the high and seems to match Goshen. This means the great pyramid was already there by time of Moses (latter 12th dyn pretty certainly) which is no big deal, and *if* it was the name in time of Joseph (3rd(-4th) dyn, ~proven) then the pyramid was there before 4th dynasty.