Archaeocryptography (from Greek ἀρχαῖος, arkhaios, "ancient"; and κρυπτός, "hidden, secret"; and γράφειν, graphein, "writing") is the Study of decoding a monument or structure by determining the underlying mathematical order beneath the proportions, size, and placement to find any re-occurring or unusual data in respect to that which is being studied, or within another monument or structure.
Archaeocryptography is not a recognized branch of Archeology or academic discipline. It is an example of pseudoscience or pseudoarchaeology that relies heavily upon predetermined calculations, and alleged evidence.
The word Archaeocryptography is derived from Archaeology which is the study of human activity in the past, and Cryptography which is the study of techniques for secure communication in the presence of third parties. Archaeocryptography has attracted determined practitioners because the borderland between the known and the unknown which limited knowledge exists and are difficult to disprove.
Archaeocryptologists try to find underlying correlations in respect that which is being studied or decoded. Some factors taken into consideration while deciphering an object, structure or Megalithic monuments can include the features such as faces, stairs, sides, and terraces. The Geolocation or mathematical operations performed on latitude and longitude coordinates. Astronomical alignments, such as are found with archaeoastronomy. The incorporation of grids. The use of numerical ordering, mathematica constants, Biblical Gematria, and or any other re-occurring number that might stand out from the decoding process. Using these factors
Archaeocryptologists than can use different mathematical formulas to find correlations within that which is being studied or between other monuments or structures that share any underlying factor(s). Popular examples are the Orion correlation theory  between the Giza pyramid complex and the three middle stars of the constellation Orion, and also theories about the region of Cydonia on Mars.
The coining of the word Archaeocryptography is often attributed to Carl .P Munck. Who after retiring from the US in Military in the late 1970s following the Vietnam Era began studying studied cartographic material  among other topics trying to search for better answer to why certain Megalithic monuments exist. This lead him to a formula he believes architects used to place and design various Megalithic monuments. Carl Munck's theory claims that megalithic monuments, such as the Egyptian pyramids, include code showing their geographical position. Geographical positions are given in conventional latitude and longitude coordinates; however, in Munck's findings, the prime meridian does not run through Greenwich, but through the Great Pyramid in Giza. His theory has been is known simply as "The Code" and it asserts that an ancient Jewish numerological system known as gematria is used in the manipulation of numbers to other key locations, mathematical components, and positions of sights in the geometry of their construction.
The theory later become popularized and among practitioners and other researchers in similar fields such as Michael Lawrence Morton, Richard C. Hoagland, Bruce Cathie, and Hugh Harleston Jr.. They began adapting Archaeocryptography into their own studies, developing different theories  and books  based on the topic.
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