Markings "hid in plain sight" for 4600 years on the East side of the Great Pyramid have yielded some secrets! 

Larry Pahl, Director of the American Institute of Pyramid Research (AIP), made a presentation at the 2020 Annual Conference of ARCE (American Research  Center in Egypt), one of the largest Egyptological Conferences in the world, on the significance of these markings.  This Conference was scheduled to be in Toronto, but because of the Covid-19 worldwide crisis the conference was held virtually for the first time April 17-18 and 24-25, 2020.

This talk is also recorded as a YouTube video.