This is a file from the Wikimedia Commons and may be used by other projects. Information from its description page there is shown below. Commons is a freely licensed media file repository.
This image was published by Matthias Süßen under the Lizenz CC BY-SA, which also allows the usage outside of Wikipedia under the following conditions:
You need to mark the image with the names of the author and licence as well as the conform weblinks – like in the example on the left. Print publications additionaly need to reproduce legalcode or its URL (https://creativecommons.org/licenses/by-sa/4.0/).
If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.
Please send me a specimen copy or the URL of the website where the image is used.