IF my theory is correct, the design of the pyramids especially their layout being a Jewish refugee area on the dirty side of the Nile is pointing to Heliopolis.

This city might have been founded by or conquered by Jewish refugees from the war in Canaan. The outline of the design might be a reflection of; yes we did own that city. That city over their used to be ours.

The Jewish culture and most conquered cultures will leave behind many small hints as to their former glory in the architecture created after they are deposed from power.

Making Not only Ptah but Atum also a monotheistic god incorporated into the Egyptian pantheon like Ra.