Photo’s credits

All visuals presented on this website have been carefully reviewed with regard to image rights and copyright.

They come from the following sources:

  • Wikimedia Commons under various Creative Commons licences or in the public domain. The author and the specific licence are indicated alongside each image.
  • Royalty-free stock photo libraries: Unsplash, Pexels and Pixabay
  • Stock photo libraries for which specific rights have been acquired: Alamy and the Zentrum Paul Klee in Bern
  • Images generated by artificial intelligence via Copilot, used only for a few visuals we were unable to find after extensive searching
  • Personal photo collection, marked [DR] (Rights Reserved): these photos are not royalty-free. If you wish to use any of them, please contact us.
  • Personal photo collection of Christiane Potay, marked © Christiane Potay: these photos are protected and may not be reproduced freely. If you wish to use any of them, please contact us.

Except for any accidental error or omission, the source of each visual is specified on the page where it appears.

If you have any questions regarding one of these visuals or its source, please contact us and we will get back to you as soon as possible.

Despite all the care taken in preparing these credits, an error may have slipped through. If so, please contact us so that we can make the requested correction or replace the visual concerned.

The assignment of specific licences to each image from Wikimedia Commons will be completed during 2026. For your information, the distribution of each of these images is subject to one of these licences::