metrological: theories regarding the construction of the Great Pyramid of Giza by hypothetical geometric measurements numerological: theories that the measurements of the Great Pyramid and its passages have esoteric significance, and that their geometric measurements contain some encoded message. This form of pyramidology is popular within Christian Pyramidology (e.g. British Israelism and Bible Students). "pyramid power": claims originating in the late 1960s that pyramids as geometrical shapes possess supernatural powers pseudoarchaeological: varying theories that deny the pyramids were built to serve exclusively as tombs for the Pharaohs; alternative explanations regarding the construction of the pyramids (for example the use of long-lost knowledge; anti-gravity technology, etc.); and hypotheses that they were built by someone other than the historical Ancient Egyptians (e.g. early Hebrews, Atlanteans, or even extraterrestrials)