Every visitor enters the Great Pyramid of Giza through a robbers' hole. Past it: the Grand Gallery, the King's Chamber, and no carved inscription naming the king anywhere inside. Khufu's name survives only as work-gang graffiti in red paint, in the sealed chambers above the King's Chamber ceiling.

• ✓Wikipedia, "Great Pyramid of Giza"
• ✓Britannica, "Great Pyramid of Giza"
• ✓Lehner 2004, "Of Gangs and Graffiti"; NOVA "Who Built the Pyramids?"
• ✓Vyse 1840, Operations Carried On at the Pyramids of Gizeh in 1837
• ✓Tallet 2021, The Red Sea Scrolls

If you've never been to Giza, this is what's inside the Great Pyramid. A stone hallway as tall as a two-storey house, climbing a hundred and fifty feet into the dark. At the top is the King's Chamber: red granite, and a stone coffin too big to fit through the passages, which suggests it was put in while the pyramid was still going up. There are no carved hieroglyphs anywhere inside. Not one wall names the king. The king's name is hidden above the ceiling, in five cramped spaces built to spread the weight of the stone overhead. Work crews painted marks there in red, and named their teams after the king. One was "Friends of Khufu". So the proof of whose pyramid this is was graffiti, sealed in for forty-five centuries, and found only when someone blasted a hole, up through the ceiling. Subscribe for a fact every day.