Centre Management:
Sierra Germany GmbH
Hamborner Straße 53
40472 Düsseldorf

Managing Directors:
Christoph Billwiller l Cristina Santos l Jorge Morgadinho

Düsseldorf Local Court HRB 53615
VAT ID DE 207057246
VAT No. 5105/5843/0931

Telephone: +49 (0) 30 269 340-0
Telefax: +49 (0) 30 269 340-110


1. Content of Online Offer

The author does not assume any liability for the topicality, accuracy, completeness or quality of the information made available. Liability claims against the author which relate to material or conceptual damage, which have been caused by the use or non-use of the information presented, or the use of erroneous and incomplete information, are excluded as a rule to the extent that there has been no demonstrable, intentional or grossly negligent behaviour on the part of the author.
All offers are subject to change and are non-binding. The author expressly reserves the right to change, supplement or delete parts of the pages or the entire offer or to temporarily suspend or discontinue the publication.

2. References and Links

For direct and indirect references to external internet sites (hyperlinks) which are outside the author’s area of responsibility, liability will come into effect exclusively if the author had been aware of the content and it was technically possible and reasonable to prevent use in the event of unlawful content. The author expressly declares that at the time of setting the link, the relevant linked sites were free of illegal content. The author has no influence over the current and future composition, or over the content of linked/associated pages or their authorship. The author expressly distances himself from all content of linked/associated sites which have been altered after the links were set. This declaration applies to all links and references set within their own internet offer and also for external entries in guest books, discussion forums, link directories, mailing lists and all other forms of databases which facilitate external commenting and which were set up by the author. The provider of the site referred to is exclusively liable for illegal, faulty or incomplete content, and in particular for damage resulting from the use or non-use of such information presented, and not the person who merely refers to the respective publication via links.

3. Copyright and Trademark Law

The author endeavours for all publications, to heed the copyright of the graphics, audio documents, video sequences and text copy used and to use the author’s own graphics, audio documents, video sequences and text copy that he created, and to refer to licence-free graphics, audio documents, video sequences and text copy. All brands and trademarks named in the Internet offer which are poss. protected by third parties are subject to the stipulations of the respective applicable trade mark legislation and the rights of ownership of the respective registered owner, without reservations. The mere mention does not allow for the conclusion that the trademark is not protected by third party rights! The copyright for published items, and items created by the author remain exclusively with the author of the pages. The reproduction or use of such graphics, audio documents, video sequences and text copy in other electronic or print publications is not permitted without the express approval of the author.

4. Data Protection

To the extent that the Internet offer provides for the option to enter personal or commercial details (email addresses, names, postal addresses), the provision of these details on the user’s part is expressly voluntary. The use of and payment for any and all services offered – in so far as is technically feasible and reasonable – is permitted even without the provision of such details respect. by providing anonymous details, or an alias. The use of contact details supplied within the framework of the publisher details or comparable data such as postal addresses, telephone and facsimile numbers as well as email addresses by a third party for the purpose of sending unsolicited information, is prohibited. We expressly reserve the right to take legal action against senders of so-called spam emails that violate this regulation.

5. Validity of this Disclaimer
This disclaimer is to be regarded as part of the Internet offer from which this page was referenced. In the case of parts or individual formulations of the text not, no longer or not completely meeting the applicable legal position, the remainder of the document remains unaffected in terms of its content and validity.