This is a non-commercial website for information purposes. Responsible for all published content according to §5 TMG is:

13403 BERLIN

Liability for links

Despite careful control of the content, I assume no liability for the content of external links. For the content of the linked pages are solely responsible for their operators. The copyright for any material created by the author is reserved. Any duplication or use of objects such as images, diagrams, sounds or texts in other electronic or printed publications is not permitted without the author’s agreement.


All gender-specific terms used in the masculine or feminine form apply equally to both genders without any judgment or discriminatory intent.

Photo evidence

The rights to the photographs are held by the photographers Friedrich Soretz, Sabina Przybyla, Jürgen Wahnschaffe, Volker Brzezinski and are indicated with the respective images or in the names of the download files.