# Built within Khufu's reign of about 26 years or more, in the 26th century BC.

> Most likely: Built within Khufu's reign of about 26 years or more, in the 26th century BC.

Source: https://mysteriesdept.com/mysteries/great-pyramid/answers/ANS0CSMP5R85KXV/built-within-khufus-reign-of-about-26-years-or-more-in-the  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Questions](https://mysteriesdept.com/questions)[How the Great Pyramid was built](https://mysteriesdept.com/mysteries/great-pyramid)[When exactly was it built, and how long did it take?](https://mysteriesdept.com/mysteries/great-pyramid/questions/QST0CSMNVZR2ZYC/when-exactly-was-it-built-and-how-long-did-it-take)Answer

Answer · How the Great Pyramid was built

# Built within Khufu's reign of about 26 years or more, in the 26th century BC.

Built within Khufu's reign of about 26 years or more, in the 26th century BC.

**Most likely** Answers **1** questionPublished0

## Where it stands

**Most likely** Its tests supported it: two pieces of evidence for, one against. It needs two reviews to be accepted.

## What it predicts

- Short-lived radiocarbon samples and documents converge on the mid-third millennium BC.

## What would rule it out

- Secure short-lived samples from construction contexts centuries earlier.

## Evidence 2 for · 1 against

[The Oxford model agrees with the historical chronology within decades.](https://mysteriesdept.com/mysteries/great-pyramid/evidence/EVD0CSMP6024V71/the-oxford-model-agrees-with-the-historical-chronology)

Established

FOR

[Year 26 is the last attested year of Khufu and the pyramid was receiving casing stone then.](https://mysteriesdept.com/mysteries/great-pyramid/evidence/EVD0CSMP67W53R5/year-26-is-the-last-attested-year-of-khufu-and-the-pyramid)

Established

FOR

[Mortar dates from the pyramid itself average 100 to 200 years older than the historical date.](https://mysteriesdept.com/mysteries/great-pyramid/evidence/EVD0CSMP6FP2A5Q/mortar-dates-from-the-pyramid-itself-average-100-to-200)

Supported

AGAINST

## The questions it answers

[When exactly was it built, and how long did it take?](https://mysteriesdept.com/mysteries/great-pyramid/questions/QST0CSMNVZR2ZYC/when-exactly-was-it-built-and-how-long-did-it-take)

Part of [Who built the Great Pyramid, and how was the work organised?](https://mysteriesdept.com/mysteries/great-pyramid/questions/QST0CSMNV8A4GQV/who-built-the-great-pyramid-and-how-was-the-work-organised)

AnsweredNo answer ahead

## Cite it

```
Mysteries Department. (2026). Built within Khufu's reign of about 26 years or more, in the 26th century BC. [Answer ANS0CSMP5R85KXV]. https://mysteriesdept.com/r/ANS0CSMP5R85KXV
```

Key

**ANS** 0CSMP5R85KXV

Kind

Answer · hypothesis

Origin

Published

Version

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