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We build this guide independently and offer it for free. Corrections, source material and recommendations help us create reliable content for visitors.

Why it matters
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How you can help
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What happens to a submission
- Stage 1
We check whether it can be verified
We compare a submission with the institution’s current website, a source document or other material whose origin can be established.
- Stage 2
We separate fact from recollection
Practical and historical facts need confirmation. A personal account is identified as the contributor’s testimony rather than presented as the only version of events.
- Stage 3
We publish a correction with context
After a change, we update the page’s verification date. We publish visual material only after confirming its author, licence and permitted use.
Nothing is published automatically, and we cannot promise to use every submission. Questions that require a museum decision, reservation or ticket service are directed to the appropriate institution.