THE BOOK
The Giza Power Plant: Technologies of Ancient Egypt, by Christopher P. Dunn, Bear & Company, Rochester, Vermont, 1998, 280 pages. Begun, by the author’s own account, on a night in September 1977 when he read Peter Tompkins’ Secrets of the Great Pyramid and saw machine schematics in the cross sections.
What the book is
The Giza Power Plant argues that the Great Pyramid was never a tomb. It was a machine: a geomechanical power plant that coupled itself to the Earth’s own vibration, converted that vibration into electricity through the piezoelectric quartz in its granite, amplified the result in a hydrogen-filled resonant cavity on the maser principle, and beamed the output out of the King’s Chamber’s southern shaft, until the hydrogen exploded and the plant was abandoned in place. Every chamber, shaft and anomaly of the building is assigned a component’s role in this machine, and the damage in the King’s Chamber becomes the accident report.
The book is really two books stapled together. The first is a manufacturing engineer’s audit of how Egyptian granite was actually cut, built on Flinders Petrie’s 1883 measurements and on Dunn’s own straightedge checks in Egypt. The second is the power plant, assembled from analogy on top of the first. The two stand or fall independently, and a reader can find the first half genuinely sharp while watching the second half escalate through resonators and masers to relay satellites, Atlantis and Edgar Cayce. This note keeps them apart deliberately, because the book’s persuasive force comes from letting the credit earned by the toolmark chapters carry forward into the machine chapters.
This note treats the book the way the site treats any interpretive synthesis, evidence tier 4. The tier rates the route, not the author. The raw materials are largely real: Petrie’s survey exists and is reproducible, the tolerances are not in dispute, the artifacts sit in museums, and the manufacturing question the book presses had genuinely been under-examined when it was written. The load-bearing move is the inference from cut surfaces to an advanced toolkit, and from the toolkit to a power plant, and each step of that inference is carried by an argument from personal incredulity that the book presents as expert testimony.
Who wrote it
Christopher Dunn is a British-born machinist and manufacturing engineer who served an apprenticeship in England restricted, he says, to saws, drills, files and chisels, then emigrated to the United States and spent what was by 1998 roughly thirty-five years in machine shops and aerospace manufacturing, including jet-engine components, laser processing and electrical discharge machining. This was his first book. His stated credential is not history but process recognition: “I am not an Egyptologist, I am a technologist” (ch. 4). What he claims to read off a cut surface is the process that made it, which is a real professional skill, and one that most of the people who write about Egypt do not have.
The credential cuts both ways, and the book is honest enough to display the problem. Thirty-five years at close tolerances makes Dunn a serious witness on what a surface looks like when a fast machine made it. It does not make “I could not do this by hand” evidence about what unlimited labour, unlimited time and techniques nobody now practises could do, and the book repeatedly converts the first kind of statement into the second. Dunn went on to write Lost Technologies of Ancient Egypt (2010) and, twenty-six years after this book, Giza: The Tesla Connection (2024), which retools the thesis around Tesla’s wireless power. This note covers the 1998 original, where the whole argument is laid down.
How the book is built
Fifteen chapters and two appendices, in three movements. Chapters One to Six clear the ground and build the manufacturing case: the tomb theory is dismantled on the absence of any original burial, the exploration record is converted into a checklist of anomalies, Petrie’s tolerance figures are established as a diagnostic, his toolmarks are reread as machine signatures, Dunn’s own 1995 straightedge measurements on the granite boxes of the Second Pyramid and the Serapeum are entered as exhibits, and Coral Castle in Florida is offered as modern proof that megaliths can be moved by non-obvious means. Chapter Seven, four pages long, is the hinge: a civilisation with that toolkit needed power, its power plants would be its largest surviving structures near water, and the Great Pyramid is exactly that. Chapters Eight to Twelve then build the machine stage by stage, fuel, transducer, amplifier, output, and wreck it in a hydrogen explosion whose residue is offered as the best evidence of all. Chapters Thirteen to Fifteen consolidate, speculate about wireless distribution and orbiting relays, and close on carbon-14 anomalies, the Mahabharata and the warning that civilisations can destroy themselves with their own energy.
The two appendices are the book’s most interesting structural decision. Appendix A reprints, verbatim, the chapter of Petrie’s Pyramids and Temples of Gizeh on mechanical methods, and Appendix B documents the wrought iron plate found in 1837 in a sealed joint of the Great Pyramid, with its three signed certificates. Reprinting one’s key primary source in full is an unusual act of generosity, and it hands the reader the means to check the author, which is worth doing, because Petrie’s own conclusion from the same toolmarks is not Dunn’s.
The declared method is reverse engineering: “I had to find an answer for every single detail found within the Great Pyramid. I could not ignore any evidence or twist it in any way” (Introduction). In practice the method runs asymmetrically. Features that fit the machine receive detailed functional readings; features that do not are passed over. That is not dishonesty. It is what single-hypothesis reconstruction does to anyone, and noticing it is the most useful critical habit the book teaches.
The chain of the argument
The negative link. Across more than eighty Egyptian pyramids, no original burial has ever been found. Dunn sources the point to Mark Lehner via William Fix, adds Kurt Mendelssohn on sarcophagi found sealed but empty, and argues that the Trial Passages east of the pyramid, which replicate the interior layout in bedrock, prove the chambers were designed as a whole from the start rather than accreted through a king’s changes of mind. If the interior is a specification rather than an accident, the question “what is it for” is open.
The precision link. Petrie measured casing stones flat to about .010 inch over 75 inches of face, set with joints averaging .020 inch; a thirteen-acre base level within 7/8 inch; the Descending Passage straight within a quarter inch over 350 feet; alignment within three minutes of a degree of true north. Dunn’s claim is that tolerance implies purpose: “the stones tell me that they were cut using machine-power, not manpower” (ch. 3). Nobody, on this argument, holds optician’s tolerances at monument scale for decoration.
The machining link. This is the technical heart. Petrie’s granite core No. 7 carries a groove read as a spiral sinking .1 inch per 6 inch circumference, cut as deeply through the hard quartz as through the softer feldspar; saw cuts on the King’s Chamber and Second Pyramid coffers record overshoots and backed-out restarts that read like a fast machine’s mistakes; bowl shards show cusps from two axes of rotation, which means lathes. Dunn’s answer is ultrasonic machining at 19,000 to 25,000 hertz, with the quartz in the granite vibrating in sympathy and explaining the deeper cut through the harder mineral. His own 1995 measurements follow: a steel parallel ground flat within .0002 inch finds no light gap inside the Second Pyramid’s granite box or the sixty-five-ton boxes of the Serapeum, and a contoured block east of Khafre’s pyramid carries a true 7/16 inch blend radius with a corner relief cut, which he reads as the signature of a three-axis machine.
The inference link. Chapter Seven converts toolkit into infrastructure: ultrasonic drills need power, power needs plants, plants are big and sit near water, and the biggest ancient structures near water are the pyramids. From here the interior of the Great Pyramid is read as “the prints for an extremely large machine” stripped of its components.
The mechanism link. The Earth is a vibrating, magnetised body under constant tectonic and tidal strain, with an electromagnetic resonance near 7.83 hertz. A structure built as a “harmonic integer” of the planet, and Dunn reads the pyramid’s Earth-commensurate dimensions this way, becomes a coupled oscillator that draws energy while offering less resistance than the surrounding rock. The Grand Gallery’s twenty-seven pairs of ramp slots held banks of Helmholtz-type resonators converting building vibration to airborne sound; the Antechamber is an acoustic filter; the granite plugs in the Ascending Passage supply feedback and interference cancellation; the King’s Chamber, its Aswan granite put at fifty-five percent quartz, is the transducer, its forty-three rough-topped ceiling beams read as bridges tuned by material removal, like bells. “Let me make no apology for the theory I am proposing. The Great Pyramid was a geomechanical power plant that responded sympathetically with the Earth’s vibrations and converted that energy into electricity” (ch. 9).
The maser link. The chambers were filled not with air but with hydrogen, generated in the Queen’s Chamber by zinc and dilute hydrochloric acid, evidenced by the salt encrustations, gypsum flakes and recorded odour there, with Gantenbrink’s “door” and its copper fittings reread as a float-switch’s electrodes. Energised hydrogen was pumped to a higher state; a microwave input at the hydrogen line of 1,420,405,751.786 hertz entered through the northern shaft, whose 8.4 by 4.8 inch section Dunn matches to the 8.309 inch wavelength; the coffer, its faces reported concave by Piazzi Smyth, acted as a lens; stimulated emission built a collimated beam that left through the southern shaft. That beam “was the reason for all the science, technology, craftsmanship, and untold hours of work” (ch. 13).
The meltdown link. The hydrogen exploded. The King’s Chamber walls are displaced outward by up to an inch, the ceiling beams are cracked and daubed with crude plaster, the coffer’s chocolate colour is overcooked red granite, the black powder of insect casts found in the chamber above Davison’s Chamber becomes flash-heated limestone dust, and the calcinated walls of the Grand Gallery mark where the wooden resonators burned. One event, many independent anomalies explained: forensically it is the book’s most interesting chapter, and the same anomalies are equally consistent with fire, earthquake and forty centuries of visitors.
The distribution link, which is missing. Dunn concedes he cannot say where the beam went or who consumed it. Chapter Fourteen offers Tesla’s wireless transmission, a passive reflector satellite, gravity control and possibly Atlantis, and the book closes with the transmission problem open. A generator with no grid, no consumers and no receiving apparatus is the hole at the centre of the thesis, and to his credit Dunn says so.
The parts a reader can check
Petrie’s survey is real, published, and reproducible. The Pyramids and Temples of Gizeh (1883) is in the public domain, the toolmark chapter is reprinted in the book itself, and core No. 7 is held by the Petrie Museum in London. The grooves, the tapers, the sawing errors and the tolerance figures are observations, not claims, and everything Dunn builds starts from them.
The tolerances are not in dispute. The casing joints, the base levelling and the passage straightness are Petrie’s numbers and have survived resurvey, including Glen Dash’s work on the base and orientation in the 2010s. What is in dispute is what they imply.
The absence of original burials is acknowledged fact, not fringe claim. Egyptology explains it by three thousand years of robbery and reuse, which is reasonable and also leaves the tomb function evidentially thinner than most readers assume.
The wrought iron plate exists. It was found in 1837 by J. R. Hill, an assistant on Howard-Vyse’s expedition, embedded in cement in an inner joint near the mouth of the southern shaft, and went to the British Museum with three contemporaneous certificates, all reproduced in Appendix B. Petrie examined it in 1881 and pointed to a cast of a nummulite in the rust as evidence of long burial. The modern record is a genuine dispute between instrumented analyses. In 1989 M. P. Jones of Imperial College and Sayed El Gayar analysed a fragment and judged it ancient, non-meteoric and gold-bearing on one face. In 1993 Paul Craddock and Janet Lang of the British Museum published a re-examination in Historical Metallurgy that found no trace of gold and read the microstructure as post-medieval refining, sixteenth to eighteenth century. The book tells the first half of that story and reports the second as an unargued dismissal; in fact the counter-analysis was in print five years before the book appeared, and a reader can weigh both. Either way it remains the book’s best-documented awkward object.
And the King’s Chamber really is strange. The displaced walls, the cracked beams, the finger-daubed plaster, the rough beam tops, the constant temperature and the salt in the Queen’s Chamber are all in the nineteenth-century record. A theory of the building owes an account of them, and Dunn is right that “it was a tomb” does not supply one.
Where the book’s own evidence sits
Strongest: Petrie’s toolmark record and the measured tolerances. Real observations by a surveyor with no machine thesis to protect. They require explanation, and they are the book’s bedrock.
Strong but weaker than it sounds: Dunn’s firsthand measurements. He went and looked, which matters, but the light-gap test is qualitative, his dial indicator broke in transit, and no instrumented survey backs the “space-age precision” verdict on the Serapeum boxes.
Middle: the wrought iron plate, and the Queen’s Chamber residues. The salt analysis Dunn cites (calcium carbonate, sodium chloride, calcium sulfate, from a 1978 Arizona lab analysis for Patrick Flanagan) is real; that the residues are process by-products rather than groundwater, condensation and limestone chemistry is the unproven step.
Weak: the acoustics. Tom Danley’s King’s Chamber tests for the Schor expedition, the F sharp chord and the resident infrasonic frequencies, reached print nowhere. They survive as radio interviews and documentary promotion, taken under a nondisclosure agreement, and are unusable as evidence in either direction. The station’s resonance bench prices what the chamber’s geometry actually does, from Petrie’s dimensions and nothing else.
Weakest: the numerical matches and the closing chapters. The pyramid-inch commensurabilities, the shaft-section-to-hydrogen-wavelength match, and the choice of which dimension to compare with which constant are post hoc; with enough dimensions and enough constants, matches are cheap. Coral Castle proves one determined man with patience, leverage and twenty-eight years can move large stones, not that he repealed physics. The Dendera reliefs resemble a Crookes tube the way clouds resemble faces. And the final chapters’ fused glass, radioactive skeletons, Mahabharata missiles and Cayce readings cost the book credibility that Chapters Three to Five had honestly earned.
Never addressed: quantity. The book contains no energy budget, no coupling efficiency, no output figure, no zinc and acid supply chain, no accounting for the industrial civilisation that a working power plant implies. For an argument whose entire authority is engineering, the absence of arithmetic is the deepest internal criticism it faces, and the station’s benches exist to supply the missing numbers.
Twenty-eight years on
Experimental archaeology answered the machining question directly. Denys Stocks spent two decades cutting granite with the tools Egyptology actually credits, copper tubes and saws driven with quartz sand abrasive, and published the programme in Experiments in Egyptian Archaeology: Stoneworking Technology in Ancient Egypt (Routledge, 2003). The experiments reproduced tube-drilled cores, tapered holes, striated grooves and sawn faces in Aswan granite, with measured cutting rates and tool-wear figures. The rates are slow, the labour is enormous, and that is the point: the method scales with workforce, and the toolmarks it leaves match the artifacts far more closely than Dunn’s 1998 argument allowed. On the specific showpiece, core No. 7, the spectacular feed rate rests on Petrie’s reading of the groove as one continuous spiral; if the marks are instead overlapping or concentric rings, the 500-to-1 ratio evaporates, and nothing in the published record settles which reading is right. The station’s Core No. 7 bench walks through exactly this arithmetic.
Contemporary documents of the construction turned up. In 2013 Pierre Tallet’s team excavated the harbour at Wadi al-Jarf and recovered the oldest inscribed papyri known, including the logbook of an official named Merer, whose entries date to the year after the thirteenth cattle count, late in Khufu’s reign, his twenty-sixth or twenty-seventh regnal year depending on how the counts are reckoned, and record his crew ferrying Tura limestone casing blocks to Giza by boat. It is contemporary, mundane, administrative evidence of the Fourth Dynasty project, with work gangs, rations and delivery schedules, exactly the infrastructure paperwork whose absence the lost-civilisation argument leaned on. Alongside it stands two decades of excavation at the Heit el-Ghurab workers’ town south of the plateau: bakeries, breweries, dormitories and cattle bone in industrial quantity.
The door was opened, and Dunn’s prediction is scoreable. Dunn predicted that behind Gantenbrink’s blocking slab lay a vertical supply shaft and more copper hardware, cables or wires running to the fittings he read as float-switch electrodes. In September 2002 the Pyramid Rover drilled through the slab on live television and found a small empty space and a second, rougher blocking stone. In 2010 the Djedi project’s snake camera went through the same hole and filmed the hidden face, releasing the images the following year: red ochre masons’ marks, and the backs of the two copper fittings, which end in small loops, staples rather than electrodes, with nothing attached. No cables, no shaft, no fluid staining. As a falsifiable prediction honestly made, it deserves an honest score: failed.
The pyramid did yield new voids, and they changed nothing yet. The ScanPyramids muon survey reported a large void above the Grand Gallery in Nature in 2017 and confirmed a corridor behind the north face chevrons in 2023. New internal structure is real and unexplained, which the alternative literature has welcomed; nothing imaged so far has any machine-like character, and the voids bear no relation to the power plant’s specified components.
The acoustics never surfaced. No peer-reviewed publication of the Danley measurements exists. The F sharp chord remains a radio anecdote.
And the question outlived the answer. The precision argument Dunn opened has had a genuine second life: CT and structured-light metrology of predynastic hard-stone vessels, argued over publicly since 2023, podcast audiences in the millions for Dunn’s appearances alongside Ben van Kerkwyk, and a 2024 sequel, Giza: The Tesla Connection. The manufacturing question is now pressed harder than at any time since Petrie. The power plant, meanwhile, has not acquired a single quantified component in twenty-eight years.
On the station bench
Two instruments in this batch price the book’s checkable core. The King’s Chamber resonance bench computes the chamber’s actual acoustic modes from Petrie’s dimensions with zero fitted constants, tests the F sharp claim against the full mode ladder, runs the northern shaft as the microwave waveguide Dunn describes, and totals the seismic energy budget the book never supplies. The Core No. 7 feed-rate bench puts Petrie’s spiral, Dunn’s ultrasonic reading, Stocks’s measured copper-and-sand rates and modern diamond drilling on one ledger, and shows how the famous 500-to-1 ratio depends entirely on which way one reads a groove.
Read the book. Decide for yourself.
Related wiki entries
The wiki entries below give background on the book’s author, sources and central claims, and on the record that has grown around them since.
- Giza Power Plant Theory
- Christopher Dunn
- Flinders Petrie
- Ancient Machining
- Core No. 7
- King’s Chamber
- Djedi Project
- Giza Iron Plate
- Lost Civilization Hypothesis
References and further reading
- The Giza Power Plant: Technologies of Ancient Egypt, Christopher P. Dunn, Bear & Company, Rochester, Vermont, 1998
- Lost Technologies of Ancient Egypt, Christopher Dunn, Bear & Company, 2010, and Giza: The Tesla Connection, Bear & Company, 2024, for where the argument went next
- W. M. Flinders Petrie, The Pyramids and Temples of Gizeh, Field & Tuer, London, 1883, chapters on mechanical methods reprinted as the book’s Appendix A; core No. 7 in the Petrie Museum, University College London
- Denys A. Stocks, Experiments in Egyptian Archaeology: Stoneworking Technology in Ancient Egypt, Routledge, 2003
- Pierre Tallet and Mark Lehner, The Red Sea Scrolls: How Ancient Papyri Reveal the Secrets of the Pyramids, Thames & Hudson, 2021, for the Wadi al-Jarf logbooks
- Mark Lehner and Zahi Hawass, Giza and the Pyramids: The Definitive History, University of Chicago Press, 2017
- National Geographic / Egyptian Supreme Council of Antiquities, Pyramid Rover broadcast, 17 September 2002; Rob Richardson et al., “The ‘Djedi’ robot exploration of the southern shaft of the Queen’s Chamber”, Journal of Field Robotics, 2013
- K. Morishima et al., “Discovery of a big void in Khufu’s Pyramid by observation of cosmic-ray muons”, Nature 552, 2017; S. Procureur et al., corridor confirmation, Nature Communications, 2023
- El Sayed El Gayar and M. P. Jones, “Metallurgical investigation of an iron plate found in 1837 in the Great Pyramid at Gizeh”, Journal of the Historical Metallurgy Society 23(2), 1989
- P. T. Craddock and J. Lang, “Gizeh iron revisited”, Journal of the Historical Metallurgy Society 27(2), 1993, pp. 57 to 59
- Peter Tompkins, Secrets of the Great Pyramid, Harper & Row, 1971, the book that started Dunn on the path