>>6517017 (lb)

Just in case it's not completely obvious to you anons, those checkerboard squares around the triangle are there to show Pythagoras's theorem:

33 + 44 = 5*5

>>6517246

That would be very insightful if it were true.

>>6517017 (lb)

The top part of the obelisk is called "The Keystone".

Sean Hross talks about it here:

https://www.youtube.com/watch?v=WXaXnAvEpB8&t=20m12s

Information about sacrifices of children here:

https://www.youtube.com/watch?v=WXaXnAvEpB8&t=11m30s