Pierre Crozat PhD



First part :

  1. C.V. Architect-Urbanist EPFL
  2. 1996 - Pyramids Constructive System
  3.  Pyramid increase: simulation
  4. 1997 - General presentation :
    1. Resume
    2. Introduction
    3. Scientifical, Technical and Operative Research
    4. The process of Pyramidal Growth
    5. Hérodotus was right
    6. Origin of matérials
    7. Technical continuum
    8. Conclusion

Second part:

  1. PhD Thesis in Civil Engineering
  2. 2002 - Publication of "Le Génie des Pyramides"
  3. 2002 - From geology to construction
  4. 2002 - Pyramids and Mathematics

Third part:

  1. Engineering of pyramids
  2.  Construction model
  3. Construction phases infographics
  4. 2005 - World Year of Physics
  5.  2006 - Fun and educational learning
  6. Journal of the Palais de la «Découverte»
  7. Paleo-topo-stratigraphic simulation of the Giza plateau

Fourth part:

  1. Geological hypothesis
  2. Open letter to Hany HELAL
  3. Circular letter to my peers
  4. Successive panels of exhibition
  5. Pedagogical experiences
  6. Curriculum Vitae Researcher

Part five:

  1. 2019 - Communique
  2. Of the logistics algorithmic ?
  3. Cheops: computer graphic construction


  1. 2006-2008 - Paris, duo de ses pyramides
  2. 2010 - Of Engineering Works & Men
  3. 2013 - Marseille, pyramid of knowledge

Go to the second site of
Pierre CROZAT Architect - Urbanist

For any questions, contact the administrator Patrick FAIVRE (pf at faivre.ml)


Beforehand the distinction between the blocks made of limestone (2.5 tonnes average) which constitute the body of the pyramid, and the 52 monoliths made of granite (30 tonnes average) which cover the King's room must be stressed. Logically enough, these two types of blocks cannot be brought into play according to the same lifting and transportation technique:

The method of construction is a true “constructive system” known as “the process of pyramidal growth” which is based on:

To lift and to lay a block onto two other blocks makes up an [Crozat's] algorithm

Modelling at scale 1/10 and at scale 1/3

This process is easy to model, in the old days just as nowadays, with more or less standardised elements: bricks, pieces of sugar - actually derived from modelling -, the elementary movement representing an algorithm. This model that “can only generates pyramids” is moreover interactive and predicative.

Modelling of the “pyramidal growth” process, by successive envelopes, rom an elementary [4+1] little pyramid at the centre of the base, side by side, by block according to the algorithm

 Infographic animation of the “pyramidal growth method”, by Fabien PASIELSKY (2002) (0,9 Mo)

The model is interactive:

The process allows to build, in time of the erection of the body of the pyramid, the entire inside devices of Cheops' pyramid: rooms, corridors (horizontal, ascending and descending), Great Gallery and ventilation shafts, the shapes and locations of which are corollary to the system.

By anticipation of the construction on one side, inclined plans can be built and a corridor, a room that will end up inside the pyramid, after the building of the four sides is complete

by anticipation of the construction of the North face, a inclined plane is built, along with a number of other parallel and supperposed inclined planes, in which, at the right time, a corridor and/or Gallery can be arranged.
monoliths made of granite ( and of limestone ) of the King's room, will then be slide up, in the open, by way of those inclined planes, which the ascending corridor and Great Gallery are the archaeological proof of.

The inclined plans allow the positioning, through sliding, of the monoliths (average of 30 tonnes each) constituting the King's room, the raising devices and the arch of discharge which corresponds to the last possible inclined plan from the foot of the pyramid

1- entrance
2- descending corridor
3- underground room
4- ascending corridor
5- shaft view
6- Queen's room
7- Great Gallery
8- portcullis' anteroom
9- King's room
10- raising and dump

the Great Gallery in profile : central slide and lateral benches/mortises regularly placed all along as a "trammel" , and the 5 or 6 future pad-blocks [9] made of granite which, put together ( 5 of 6 tonnes each of them), will serve as counterweight, must be understood as an “extraordinary oblique lift”, allowing to haul up - by the balance of forces - all the monoliths constituting the King's room and the arch of discharge.

An “extraordinary oblique lift” with rack, counter-weight (pad-blocks)

these monoliths made of granite [10] are used to support and raise the arch of discharge made of limestone (strained by the compression ) to the exact height so that the descending charge will not push into the vacuum of the Great Gallery, which would put its balance and the perenniality [11] at risk.

All these devices will then be contained in the pyramid by the continuation of the building on the four faces.

The model is predicative and can be tested; it imposes that:

Layout of the blocks on the S.W. edge . . . and on the top (notice the notches)

Optical restitution of the leveled top of Cheops and interpretation a color for each side by the author

Finally the pyramid will be covered by a last coat brought into play in the same way -made of fine limestone, of granite, or of stone coming from the same origin- that will be then cleaned by knocking down the nosing of the stratums, “the pyramid will be completed starting from the top” - dixit Herodotus - because this cleaning executed backwards, from top to bottom, eliminated all the entablatures on which to rest the tripod. It is then impossible to add any other block to the edifice.

Mykerinos, last granite “cleaned” envelope