The Great Pyramid

Guardian's Great Pyramid
http://www.guardians.net/egypt/gp1.htm

Precession and the layout of the Ancient Egyptian pyramids
An article by astronomer Professor Tony Fairall (June 1999, Journal of the Royal Astronomical Society) commenting on the theory proposed in "The Orion mystery".
https://academic.oup.com/astrogeo/article/40/3/3.4/197342?login=false

AERA-How old are the pyramids?
Radiocarbon dating and the pyramids.
https://aeraweb.org/projects/how-old-are-the-pyramids/

Dating the Pyramids
Abstract of an article by members of the David H. Koch Pyramids Radiocarbon project published in the September/October 1999 issue of Archeology magazine.
http://www.archaeology.org/9909/abstracts/pyramids.html

Instructions for a fold-up Great Pyramid
And explanations of the internal geometries, from the Sacred Geometry Design Sourcebook.
http://www.geometrycode.com/sgds/p189.shtml