While researching the metrology of the megalithic monuments of Britain and Egypt, Ellis made an important and previously unnoticed observation. Many of the megalithic monuments of the world, including Stonehenge and the Great Pyramid, can be viewed as being maps of the earth. These maps are verifiable as being designed in this fashion because they include within their structure the latitudes of specific topographical features on the surface of the earth. The architect of these monuments was making maps, the only thing now to be found is where the X marks the spot was placed...The ancient monument builders were constructing technical messages for the future, messages like the mathematical constant pi above. Thoth, Architect of the Universe has gone beyond this simple observation and found evidence of maps carved into the very fabric and design of these great megalithic monuments. Structures like the great henge of Avebury are quite obvious in their cartographical design, others, like the Great Pyramid of Giza, are less obvious. Nevertheless, all of these monuments can be seen to be maps of our Earth, maps that date from the Neolithic age.