Giza & Saqqara

Standing in the King's Chamber

You climb the Grand Gallery bent double, in a queue, breathing other people's air. It smells of stone and sweat. Then the passage opens and you are inside a room of polished red granite, and every conversation in it goes quiet within about ten seconds. I have never seen a group of tourists fall silent that fast anywhere else.

The room is almost empty. A lidless granite box against the west wall, scarred at one corner. Walls that meet at angles you could check with an instrument. Above your head, out of sight, five stacked relieving chambers nobody was meant to see.

The granite came from Aswan, roughly 800 kilometres upriver. The largest beams over that ceiling weigh in the region of fifty to eighty tonnes. They were floated north, hauled up onto a plateau, and lifted some forty-three metres into the interior of a building that was still being built around them.

I keep being told this is understood. Standing under it, I could not make the explanation and the object meet.

I want to be careful here, because this is exactly the point where a certain kind of writing takes off and never comes back. So let me be plain about what I am claiming: nothing. I am recording that the gap between the account and the artefact felt wider in person than it does on paper. That is a feeling, not evidence. What follows is the evidence.

What is actually there

Three main pyramids, built across roughly three generations of the Fourth Dynasty, attributed to Khufu, Khafre and Menkaure. The Great Pyramid stood around 146.6 metres and now stands closer to 138.5, having lost its outer casing to later builders. Each base side runs about 230.3 metres, and the four sides differ from one another by a matter of centimetres.

Around them: queens' pyramids, boat pits, mastaba fields, causeways, a workers' settlement with bakeries and a cemetery, and the Sphinx in its quarried enclosure. This was not a monument dropped on empty desert. It was an industrial landscape.

And since 2013 we have something we did not have for four thousand years: paperwork. At Wadi al-Jarf on the Red Sea coast, excavators found papyri including the logbook of an inspector named Merer, who ran a team ferrying fine limestone from the Tura quarries to Giza. It is administrative, tedious, and extraordinary: the day to day shipping records of the Great Pyramid's construction, written by someone who was there.

That document settles a real argument. Whoever raised this, it was organised, salaried, catered Egyptian labour, working to a schedule. Any account that requires the builders to have been someone else has to explain Merer away, and I have not seen one that does.

The sky here

The pyramid's sides are aligned to the cardinal directions to within a few arcminutes, under a fifteenth of a degree. There is no magnetic compass that could do this; magnetic north is nowhere near accurate enough. It has to have been done astronomically, from the stars or the sun.

The leading explanations are elegant and low-tech: sighting the rising and setting points of a circumpolar star and bisecting the angle, or tracking the tip of a vertical rod's shadow through a day. Glen Dash has proposed the fall equinox: on that day the tip of a rod's shadow traces a nearly east-west line, and the Egyptians could have found the day by counting 91 days on from the summer solstice. He measured the Great Pyramid's alignment as better than four minutes of arc, about one fifteenth of a degree, rotated slightly counterclockwise from true north. The caveat is his own to carry: there is no record that the Egyptians used this method, and more than one method may have been in use.

What I find genuinely interesting is not that they achieved it. It is that they cared enough to. Nothing about a tomb requires this. The alignment cost them time and skill and bought them no structural advantage. It bought meaning, and we no longer know what the meaning was.

The 43,200 claim

A claim keeps circulating in videos and podcasts. Multiply the Great Pyramid's height by 43,200 and you get the Earth's polar radius. Multiply its base perimeter by the same number and you get the Earth's circumference at the equator. Archaeologists, the story goes, call this coincidence, and the alternative on offer is a lost civilization that measured the planet and built the result into a monument aligned to true north. The wording I checked is a spoken version attributed to Graham Hancock. The idea is older than any one speaker: in Fingerprints of the Gods (1995) Hancock presents the pyramid as a 1 to 43,200 scale model of the Earth, following Livio Stecchini, according to a book summary (I have not read the book itself). I check the claim, not the person.

The alignment is real; it is the section above. The arithmetic is something you can check, so I ran it.

Pyramid figures: a base side of about 230.3 m and an original height of 146.6 m, from Wikipedia's article on the pyramid. Earth figures: WGS-84. The arithmetic is mine.

That is close, and I would rather say so than pretend it is not. It is also not exact. The first fit is 24 kilometres short, the second 272. And the first depends on a height nobody can measure directly: the casing is gone, so 146.6 metres is a reconstruction from the surviving slope and base. Use the 138.5 metres that stands today and the fit is off by almost six percent.

Two fits, one coincidence, and a planet that is not round

Here is the part that tends to go missing. The pyramid's base perimeter divided by its height is 6.2849. That is 2π (6.2832) to within 0.04 percent. So the two fits are not two coincidences. They are one property of the pyramid, perimeter ≈ 2π × height, held up against a planet that is nearly, but not quite, a sphere. The Earth's equatorial circumference divided by its polar radius is 6.3043, not 6.2832. That 0.34 percent is the equatorial bulge. A pyramid that fits the polar radius therefore cannot also fit the equatorial circumference: it comes up about 270 kilometres short. Counting the two as independent confirmations counts one proportion twice.

Where the 2π comes from

The Egyptians did not specify slopes as angles. They used the seked: how many palms the face moves sideways for each cubit (seven palms) of rise. The Great Pyramid's seked is 5½ palms, which is 11 across for every 14 up, a slope of about 51.8 degrees (Wikipedia gives 51°50′40″). Put half the base at 11 and the height at 14, and the perimeter is 88 against a height of 14. That is 44/7, which is twice 22/7, the familiar approximation of π. The 2π is sitting inside the slope. Some Egyptologists read that as intended; others argue the Egyptians had no concept of π and that the slope reflects the choice of seked alone (both positions as summarised on Wikipedia). With this seked, 2π falls out whether anyone wanted it or not. That much is arithmetic, not opinion.

The Rhind papyrus, copied around 1550 BCE, roughly a thousand years after Khufu, shows the seked in use. Problem 56 asks for the slope of a pyramid 250 cubits high on a 360-cubit base and gets 5 1/25 palms. So the seked is the genuine Egyptian design language, and that number is a different one from Giza's. The same papyrus works a circle's area as 64/81 of its circumscribing square, which implies a π of about 3.16, not 22/7. It is a later document. It tells us about practice, not about what was in the heads of Khufu's architects. Miroslav Verner is quoted on Wikipedia as concluding that the Egyptians could not define π precisely but used it in practice.

Two other pyramids complicate the picture. Meidum, usually dated just before Khufu's reign, has the same seked of 5½ palms according to Wikipedia's article on the seked, so this slope was not invented for Giza. And Khafre's pyramid, a generation later and almost as large, is given as 215.25 metres at the base and 143.5 metres high, about 53 degrees (Wikipedia has 53°10′ in one place and 53°08′ in another). Its perimeter divided by its height is 6.0, my own arithmetic, 4.5 percent under 2π. If the aim was to encode π, the pyramid next door did not get the instruction. That does not prove Khufu's builders did not mean it. It shows that the 2π belongs to one slope, not to Giza as a whole.

The same 11 to 14 triangle also gives the golden ratio, slant height over half the base, to within 0.03 percent (my arithmetic). Scholars treat that link as coincidence, since the golden ratio is not documented in Egypt before the fifth century BCE (Wikipedia, on pyramidology). A single slope that matches two different “hidden constants” without trying is a warning about how easily near-ratios are found.

Why 43,200

The multiplier is the free parameter. Any height can be scaled onto the polar radius by picking the right factor. For 146.6 metres it is about 43,360 (my arithmetic), so 43,200 is a round number nearby, not a result. The method is old. John Taylor in 1859 and Charles Piazzi Smyth in the 1860s did the same with “pyramid cubits” and “pyramid inches”; Taylor noted that ten million pyramid cubits come close to the polar radius. Flinders Petrie re-measured the pyramid in 1880, found it several feet smaller than they had believed, and concluded that the pyramid inch had no real basis. Martin Gardner used the Washington Monument to show that numerical patterns turn up in almost any structure (as described on a physics page at SMU; I have not read Gardner myself). A pyramid is a rich target: dozens of lengths, angles and ratios, and a planet that offers dozens of numbers to match them against.

What nobody has found

I know of no Egyptian text that gives the size of the Earth. The earliest documented measurement of its circumference that I can point to is Eratosthenes', in the third century BCE, some 2,300 years after Khufu, using shadows at Syene and Alexandria. That is a statement about my reading, not proof of absence. But knowing north is not knowing size: stars and shadows give a direction without saying how large the planet is. And we do have the builders' own paperwork, Merer's logbook above, which describes an Egyptian crew doing Egyptian work. The claim asks for an unseen civilization to explain a ratio that the seked already produces.

Under the plateau

Questions about what lies beneath Giza get three kinds of answers, and they should not be mixed. Some come from instruments and passed peer review. Some were published and then failed review. Some were announced at a press conference or on a podcast and never went through review at all. The table sorts the claims I could find by that status, not by how exciting they are.

Status as of 14 October 2026. For the three unreviewed or retracted claims my sources are the abstract of the retracted paper and press coverage. I found no paper or dataset for the 2025 and 2026 claims.

The retracted paper

The first claim was published in a journal, which makes its fate the most informative. In October 2022 Corrado Malanga, an organic chemist at the University of Pisa, and Filippo Biondi, a telecommunications engineer who was then a visiting professor at the University of Strathclyde, published a method in Remote Sensing (MDPI, volume 14, article 5231) that they called SAR Doppler tomography. According to the abstract, it analyses micro-movements of the pyramid that they attribute to background seismic waves, in images from the Italian COSMO-SkyMed satellites, and the pyramid “becomes transparent” in that domain. The abstract itself says synthetic aperture radar normally cannot see inside solid structures.

After a reader raised concerns, the journal retracted the paper on 10 August 2026. Its notice says the editors “confirmed serious methodological flaws and statistical errors” and that the findings are not reliable. Newsweek reports that the notice does not allege fabrication or misconduct, and that the authors disagree with the retraction without giving reasons. Lawrence Conyers, an emeritus professor at the University of Denver and a radar specialist, is quoted by Retraction Watch saying the micro-movement explanation does not work. Sarah Parcak, an archaeologist at the University of Alabama at Birmingham, says radar “can't see through rock”. I read the abstract and the press coverage, not the full paper or the notice.

The 2025 “underground city”

In March 2025 the same team extended the claim from the Great Pyramid to the whole plateau. Press accounts describe eight hollow cylinders in two rows of four, about 648 metres deep and wrapped in spiral pathways, standing on two cube-shaped blocks of about 80 by 80 metres, and a network of chambers and tunnels reaching about two kilometres. None of it was published in a journal. Zahi Hawass told The National the researchers were “completely wrong”; Newsweek reports him saying the team lacked permission and that there was no scientific evidence. Conyers called the claim a “huge exaggeration” to the Daily Mail, as reported by Euronews. The 2026 retraction covers only the 2022 paper on the Great Pyramid. It is not a review of the 2025 claims, which were announced by the same team.

A second Sphinx

In late March 2026 Biondi said on a podcast that a second Sphinx may lie under a sand mound north-east of the Great Pyramid, and put his confidence at about 80 percent. Three arguments are reported. First, satellite radar that he reads as shafts and passages. Second, the Dream Stele, a slab set between the Great Sphinx's paws around 1400 BCE, whose doubled images some read as two sphinxes; Egyptologists read the doubling as the Egyptian habit of symmetry, and its text does not mention a second statue. Third, a geometric alignment between the pyramids and the Sphinx. The idea itself is older: blue News reports that Bassam El Shammaa proposed something similar in 2007, and that a YouTuber, Damiano Piras, published a book on the hypothesis in March 2026.

The reported responses: a fact check by GADMO and AFP found no scientific basis, the Egyptologist Vincent Rondot criticised presenting hypotheses as facts, and Hawass called the work “mere inventions”. Newsweek rated the claim false. No excavation has been announced and no peer-reviewed study supports it. All of this is secondary reporting; I did not hear the podcast.

How deep can the instruments see?

The findings at Giza that passed review reach metres to tens of metres, or use a different physics. The Western Cemetery study found a deeper anomaly at 3.5 to 10 metres, and ScanPyramids used cosmic-ray muons, which pass through the pyramid itself. Claims of structures hundreds of metres down depend on satellite radar, which reporters quoting specialists say resolves features only a few metres below the surface, and on a method whose own abstract concedes that radar normally cannot see inside solid structures.

Leonardo and the chambers

A claim I keep meeting, here from someone describing an overlay, runs like this. Leonardo da Vinci drew the Vitruvian Man in 1487. Lay the Great Pyramid over it and the horizontal lines of the drawing fall exactly on the chambers. On this reading Leonardo left a prediction: the next chamber would sit at the throat. Ground-penetrating radar is said to have found one there since, with others where the pineal gland sits and at the crown, and so the chambers stand for the chakras. It is the most elegant idea about Giza I have come across. It is worth taking apart piece by piece, because the pieces are not equally weak.

Status as of 18 October 2026. “Not verified” means I could not find a source, not that the claim is false. I have not seen the overlay itself, only the claim as it is repeated.

What the drawing is

Leonardo drew it in Milan, around 1490. It is kept at the Gallerie dell'Accademia in Venice and is rarely shown because it is fragile. The text beneath it describes a man with the legs slightly apart and the arms raised until the middle fingers touch the line through the crown. The centre of the outstretched limbs is then the navel, and the space between the legs forms an equilateral triangle. Leonardo separates that centre of magnitude from the centre of gravity, which stays on the central line from the throat through the navel to the pubic bone however the figure moves. The Stanford page, citing Britannica, says he saw the body as a cosmografia del minor mondo, a map of the universe in small. That is where I would start if I wanted to take the theory seriously.

What has been found inside the pyramid

The peer-reviewed interior findings are in the table under the plateau. The headline “radar found it” mixes up two things. ScanPyramids worked with muon imaging and thermography, and no source I read names ground-penetrating radar for the Great Pyramid. Separately, one satellite-radar paper claimed to see chambers inside it, and that paper was retracted. As far as I could find, neither method has produced a chamber at the height of a throat, a pineal gland or a crown.

Why the overlay cannot tell us anything yet

An overlay has three free choices: the scale, the alignment, and which lines count. The pyramid's original height was 146.6 metres. One older source puts the Queen's Chamber 67 feet, about 20 metres, above the base, which is about 14 percent of the way up. The Subterranean Chamber lies some 27 to 30 metres below the base, so a figure standing on the base would have it under his feet. I could not find the King's Chamber's height in a source I opened, so I leave it out. With the feet on the base, a chamber 14 percent up falls below the knee by ordinary body proportions. To put it at a chakra the figure has to be shifted, rescaled, or both. Each adjustment is allowed, and that is the problem: a pattern with seven body positions, half a dozen interior features and freedom to slide and scale will fit almost anywhere.

The test is easy to state. Fix the rule before looking: where the feet stand, how tall the figure is, one list of body lines, one list of chambers. Count the matches. Then slide and rescale the figure at random many times and count again. If the claimed alignment beats nearly all the random ones, it is interesting. If a quarter of random placements do as well, it is not. I cannot run this without the overlay. If the person who made it publishes the scale and the alignment, I will add the result here.

Was every stone made to fit?

A claim I keep meeting, here from someone describing what it is like to stand at the Great Pyramid, has two parts. The first: each block is an interlocking stone made for the exact place it went, so the pyramid cannot have been built from two million identical pieces. The second follows from it: nobody could have risked cutting a stone wrong halfway up, so the builders must have worked from a blueprint and known in advance that it would succeed. I take the parts separately, because the first is partly right and the second does not follow.

All figures are as given on the Wikipedia pages and the Apollo article listed under Sources. I did not read Petrie, Arnold or Lehner directly.

What you see when you stand there

The Great Pyramid has lost its outer casing to later builders, as this page says above. What you look at from the ground is therefore the core. Wikipedia says the core stones of the pyramid were roughly cut, especially in the Great Pyramid, and that the gaps were filled with gypsum and rubble. Most blocks are not uniform in size or shape. The same article puts about 500,000 tonnes of mortar into the pyramid, and Apollo Magazine says exploratory drilling found sand-filled cavities. Even the course heights vary: about 1.49 metres at the base, barely over 50 centimetres near the top, and in between a pattern of decline and sudden rise that Petrie noted in 1883.

That is close to the opposite of a puzzle where each piece has one possible place. Roughly cut blocks, mortar and rubble are how you build a huge mass without making every stone exact. The description of stones shaped to fit their neighbours, with joints you cannot slide a blade into, belongs to the Inca walls at Sacsayhuamán. I do not know whether the speaker had that in mind, and I may be missing a source that calls the Giza blocks interlocking.

Where the precision is real

The outer layer is a different matter. Fine white limestone from Tura formed the casing, and Wikipedia gives joints that average only 0.5 millimetres wide. Apollo Magazine says that, unlike the core, the casing “had to be perfect”. In 1992 Mark Lehner and Roger Hopkins quarried and set stones with copper tools, and the account on Wikipedia says they failed to duplicate the ancient jointing, although Hopkins believed more practice would have solved it. That is a genuine open question, and I am not going to wave it away.

But look at the worry in the claim: a stone found to be wrong halfway up the structure, with all that waste. Herodotus described the finishing order as the upper part first, then the next below. Apollo Magazine says the workmen smoothed the blocks only after they were laid, probably from the top of the pyramid down. I could not confirm how the joints were cut, and part of the fitting was probably done in the quarry. But a surface that is finished after the stone is in place does not need to be a perfect cut when it leaves the quarry. The failure the claim imagines is not as fatal as it sounds.

They had done this before

This is the part of the claim that is right, and the record is on the ground. Djoser’s Step Pyramid at Saqqara went through six building phases according to Wikipedia, from a square mastaba to a stepped pyramid, with the stone blocks growing from about 0.3 metres in the early phases to about 0.5 in the last. Some Egyptologists see a changing plan there. Stadelmann argues the pyramid was planned from the start, so the reading is not settled.

At Meidum, usually dated just before Khufu, the structure was built in three stages and, on the account Wikipedia gives, probably collapsed during construction, with the casing sitting on sand rather than bedrock. Franck Monnier and others date the collapse much later, in the New Kingdom, and Wikipedia cites evidence against that. At Dahshur, Sneferu’s Bent Pyramid changes its slope from about 54 to about 43 degrees at roughly 47 metres. Kurt Mendelssohn proposed in 1974 that this was a stability precaution after Meidum, and the article lists other explanations. Wikipedia also records that its upper chamber has cracks covered with gypsum. Dieter Arnold (1991) and Lehner (1997) are cited there for non-standardised, ad hoc construction methods.

So Khufu’s builders had done it before, within about a century, on Egyptian ground, with the failures visible. What that shows is a craft learned in public, not a blueprint that arrived whole. The idea that nothing could be wasted meets the same record: Meidum, the Bent Pyramid’s changes and its cracks are what waste looks like.

Not two million unique stones

Estimates for the Great Pyramid run from about 2 to 2.8 million blocks. Wikipedia reports that Lehner and Hopkins, with twelve quarrymen, carved 186 stones in 22 days using copper tools, and that Franck Burgos estimated about 3,500 quarrymen could have supplied the 250 blocks a day needed. Work-gang graffiti, including Khufu’s name, were found in the relieving chambers, and Tallet reports haulers grouped in gangs of forty with an “overseer of ten”. Merer’s logbook, above, shows the supply side. This reads like a trained, organised workforce producing roughly cut blocks at scale and finishing the visible surface by hand, which is a different picture from custom-made stones.

The granite beams above the King’s Chamber

Another claim, sent to me in this form: above the King’s Chamber are five more chambers, roofed and floored with granite beams of about seventy tonnes each, hundreds of them, and archaeologists cannot explain how that was done with leverage and mechanical advantage. The message was cut off at the point where it says the archaeologists “conveniently” do something, so I do not know how it ended. I can check the facts it states.

I could not verify a total number of granite beams. Tour Egypt and the Ancient Egypt Online page are popular sources, not excavation reports. If you know a published count, tell me.

The structure is real and remarkable. The chambers are low, only a few feet high according to Tour Egypt, and their purpose is generally read as relieving the pressure of the masonry above the King’s Chamber. The granite came from Aswan, more than 900 kilometres to the south, carried by boat on the Nile and then moved nearer to the plateau by a dry offshoot of the river, according to Wikipedia. Work-gang marks with Khufu’s name are painted on the walls of the chambers, and Wikipedia reports that they were previously inaccessible.

Where the claim goes too far is the word “hundreds”, the figure of seventy tonnes for each beam, and the step from “we have not settled the method” to “it cannot be explained”. The sources I read do not give hundreds, and the heaviest granite is in the range of 25 to 80 tonnes. Raising a beam of that weight some forty metres is a real problem, and this page says so in its open questions: the proposals are ramps, spiral ramps, internal ramps, levering systems and combinations, and each runs into trouble. The 2018 season at the Hatnub quarry found a ramp system with postholes and steps, which is evidence that Egyptians moved large stones on steep slopes, although it is not proof of how the Giza beams were lifted. That is a gap in the evidence. It is not an absence of any explanation, and I would not call anyone’s silence on it convenient without seeing what they said.

What would settle the count: a published survey of the chambers giving the number, dimensions and estimated weight of each beam. What would settle the method: evidence along the route from quarry to the building, such as ramp remains, worn sledge tracks and lifting tackle on the plateau.

Were the pyramids really tombs?

Another passage sent to me makes five claims in a row. The Egyptians believed in Kemet, the people who lived before them. The idea that the Great Pyramid was a pharaoh’s tomb is only about 150 years old, and even the locals did not believe it. There is not one glyph inside any of the pyramids. No mummy was ever found in any of them. So the whole thing is one group’s theory that stuck. Some of that is true, and some of it is not, so I checked the pieces one at a time.

Classical passages as compiled on Jason Colavito’s page and the History Skills page, which I did not check against the translations. The rest as given on the Wikipedia pages under Sources.

Where the claim is right

The pyramids at Giza are strikingly plain inside. The Great Pyramid’s chambers carry no inscriptions apart from the marks the work gangs left in the relieving chambers, and no body was found in it. Diodorus even says the two kings who planned the pyramids were not buried in them, because angry crowds threatened to drag out their bodies and the kings ordered secret burials elsewhere. Pliny gave other reasons: treasure kept from rivals, or a way to keep the poor busy. So the ancient writers did not all agree on who lay where, and a modern reader is right to ask how firm the evidence is for a body in any particular pyramid. Wikipedia also notes there is continued disagreement among Egyptologists about the theology behind pyramids, from a stairway to heaven to a kind of resurrection machine.

What the tomb reading rests on

It is not one theory from the nineteenth century. The oldest writing carved inside a pyramid is a set of spells for the dead king, meant to guide him to eternal life even if the funerary cult stopped, according to Wikipedia on the pyramid of Unas. Fragments of a mummy lay in Unas’s chamber, along with the handles of two knives used in the opening of the mouth ceremony. The Giza pyramids stand among queens’ pyramids, boat pits and mastaba fields, as this page says above. That does not show who was buried in the Great Pyramid, and the answer to that may be a king whose body was lost to robbers.

The Fourth Dynasty, which built Giza, is also earlier than any of the carved texts. They begin more than a century after Khufu, with Unas at the end of the Fifth Dynasty. A plain chamber in Khufu’s pyramid is therefore what I would expect of its period, not a sign it was never a tomb. It is a fair point that I know of no inscription from Khufu’s time that says what the building was for, and I am reading the purpose from the evidence around it, not from the building itself.

What is still open

How old is the Sphinx enclosure?

Robert Schoch has argued that the weathering pattern on the enclosure walls is consistent with prolonged rainfall rather than wind and sand, which would push the carving back to a much wetter period. Colin Reader proposed a smaller shift on different grounds. Most Egyptologists and geologists disagree, pointing to the layered composition of the limestone, salt weathering, and the absence of any culture at that date capable of quarrying it.

I have stood in that enclosure and I cannot adjudicate a geology dispute by looking at it, and neither can you. What I can say is that the argument is about real, observable rock, made by qualified people, and it has not been resolved to everyone's satisfaction. I am content to leave it there.