Abstract. The architectural complexes composed by the two main pyramids of Giza together with their temples are investigated from an interdisciplinary point of view, taking into account their astronomical alignments as well as their relationships with the visible landscape. Combining already known facts together with new clues, the work strongly supports the idea that the two complexes were conceived as parts of a common project.
IntroductionThe Giza Plateau overlooks today's city of Cairo, Egypt. Here, in a short period of time (certainly comprised between 2600 and 2450 B.C.) during the so-called Old Kingdom, the expert workmen and architects of the pharaohs of the fourth Egyptian dynasty constructed for their rulers two pyramids which are, still today, among the most remarkable achievements in the whole of human history. We shall call these pyramids Giza 1 and Giza 2; with side lengths of 230.3 and 215 m, and heights of 146.6 m and 143.5 m respectively, Giza 1 and Giza 2 are far greater than the third famous pyramid present on the Plateau, the tomb of the pharaoh Menkaure. This pyramid indeed hardly reaches 65 m in height and is therefore also much smaller than the three pyramids constructed some eighty years before by the pharaoh Snefru in the sites of Meidum and Dahshur, south of Giza, all of which reach an height of more than 90 m. The present paper deals only with Giza 1 (the so-called Great Pyramid ) and Giza 2 as well as with their architectural complexes.It is very well known that the Giza pyramids were constructed with an extremely high degree of accuracy, in spite of their tremendous building difficulties. In the course of the last two centuries, the accuracy of construction compared to the gigantism of the projects stimulated hundreds of "theories" which have nothing to do with the ingenuity and the way of thinking of the ancient Egyptians nor with the way their architects worked. Thus, unfortunately, a noisy background of non-scientific theories tends to interfere with any serious approach to the structural, technical and anthropological problems posed by such wonderful monuments. In particular, it is easy to find in books (or websites) plenty of strange triangulations, criss-crossing lines or even complex curves traced on maps of the Plateau, which allegedly represent the hidden legacy of the pyramid builders. On the other side, however, it is clear -at least in the opinion of who writes -that a re-examination of these monuments from an interdisciplinary point of view would be worthwhile. Such a reexamination would have to take into account, of course, what Egyptology has established in 150 years of research on ancient Egypt, but knowledge gained in other fields as well, for instance, geology, architecture and structural engineering.1 In the present paper, an interdisciplinary approach is used to study the layout of the Giza 1 and Giza 2 complexes from the point of view of the relationship between architecture, astronomy and landscape. As we shall see, understanding such relationships involves the ...