The so-called concave faces of the Great Pyramid: Facts and cognitive bias

Abstract

This article provides an up-to-date summary of ongoing research into the so-called concave faces of the Great Pyramid of Khufu. A re-evaluation of the condition and form of the faces of the monument is followed by a review of the descriptions recorded during all the historical eras. This work leads to a re-evaluation of the characteristics of the indentations and demonstrates that this unique feature first became apparent during the more recent history of the monument.