Competing Interpretations: Internal Ramp vs. Stepped Core

March 10, 2026

EgyptTheory

Pyramid complex3000 - 1500 BC

Source: NEW | Geophysics Reveals Great Pyramid Stepped Core and Construction Ramp? by Ancient Architects

Site mentioned

📄 The Great Pyramid of Giza 🌍 Show on the globe

Jean-Pierre Houdin sees the denser spiral as evidence of an internal construction ramp for the upper portion, while some researchers argue the same density pattern could be a stepped core rather than a ramp. Debate continues!

Key facts

Jean Pierre Houdan proposes an internal spiraling ramp used during construction.
Keith Hamilton and others argue the same density pattern could be a stepped core rather than a ramp.
Wallace's Mysteries of Antiquity suggests the denser band may represent an external ramp used to build the step core.

Sources

Monumental Shift - Smithsonian Magazinesmithsonianmag.com

In the final stage, Houdin contends, the builders reached the steep upper layers of the pyramid by means of spiraling internal ramps, or tunnels ...

The Great Pyramid built from the inside out? - The History Blogthehistoryblog.com

Mr Houdin said that an outer ramp all the way to the top of the pyramid would have blocked sight lines and left little room to work, while a ...

[PDF] KHUFU'S PYRAMID - The “Inside-Out” construction theory3ds.com

A spiraling internal ramp is still visible. The same methods still in ... Jean-Pierre Houdin, Dassault Systèmes, Bulleplexiglass, Farid Atiya, Ludwig ...

[PDF] Building The Great Pyramid At Giza: Investigating Ramp Modelsarchaeology.brown.edu

This image was shown to Henri Houdin, an engineer and Jean-Pierre's father, in 2000 and suggested that the internal ramp was still inside the pyramid, “running.

Building the Great Pyramid of Giza: Jean-Pierre Houdin's Internal ...heritage-key.com

French architect Jean-Pierre Houdin reckons he has the answer, and he's dedicated the last decade to trying to prove it. While there are still holes in his ...

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