Why it matters
Squared to true north within arc-minutes, level to centimetres — yet the granite coffer held no body, no goods, no inscriptions, and the pyramids built afterwards are markedly cruder.
What mainstream says
The tomb of Khufu, robbed in antiquity; the Wadi al-Jarf logbook of Merer ties construction to his reign; later pyramids decayed as the state weakened.
Graded Contested · C on the Ancient Code honesty scale (A grounded · C contested · S speculation · U unidentified). It belongs to the Impossible stone line of evidence.
Sources & further reading
The authoritative reference for this site/finding — and its own primary citations — so you can check us.