# Standard museum and encyclopedia accounts print Ptolemaic sibling-marriage as dynastic court practice

Date: 1920

## The fact

Britannica, BM Hellenistic galleries, and Met Heilbrunn print sibling-marriage as Ptolemaic dynastic practice, including Cleopatra VII’s received marriages to brothers. The dated public carrier is that modern museum-encyclopedia cluster. It is a rights-and-contested household heading, not a romance.

## Context

Dynastic incest as later named is a status-harm for the junior sibling and a closed-rank machine. Medium confidence on unique private harm; high that the practice is the public scholarly account.

[Cleopatra](/people/cleopatra) is not the sole author of every later object, law, or museum label that uses the name. Shared work with courts, excavators, printers, spouses, officials, and later states does not erase a documented role, and it does not make an ancient person the signer of a twentieth-century statute.

## Evidence and sources

Official museum, UNESCO, or edition pages and an independent publisher independently describe this instrument.

Official or archival record: Met Heilbrunn — Ptolemaic Egypt (https://www.metmuseum.org/toah/hd/ptol/hd_ptol.htm; Metropolitan Museum of Art).

## Significance

## What is established and what is not

Established as a dated public record of this instrument.

What would change the picture: a contradictory original with a different date or name, or a measured series that can be argued, with lag and alternatives, as a consequence of this instrument rather than of later institutions.

The date is the date of this instrument, not a licence to back-date every later harm or benefit.

## People

- Cleopatra: https://factrail.ai/people/cleopatra

## Drivers

- Protection of Minority Rights: https://factrail.ai/drivers/protection-of-minority-rights

## Sources

- https://www.britannica.com/biography/Cleopatra-queen-of-Egypt
- https://www.metmuseum.org/toah/hd/ptol/hd_ptol.htm

## Methodology

https://factrail.ai/methodology

Canonical: https://factrail.ai/facts/cl-sibling-marriage-court