http://commons.wikimedia.org/wiki/File: ... uselang=de

This UK artistic work, of which the author is unknown and cannot be ascertained by reasonable enquiry, is in the public domain because it is one of the following:
A photograph, which has never previously been made available to the public (e.g. by publication or display at an exhibition) and which was taken more than 70 years ago (before 1st January 1944); or
A photograph, which was made available to the public (e.g. by publication or display at an exhibition) more than 70 years ago (before 1 January 1944); or
An artistic work other than a photograph (e.g. a painting), which was made available to the public (e.g. by publication or display at an exhibition) more than 70 years ago (before 1 January 1944).
Warning sign This tag can be used only when the author cannot be ascertained by reasonable enquiry. If you wish to rely on it, please specify in the image description the research you have carried out to find who the author was.

Warning sign The above is all subject to any overriding Publication right which may exist. In practice, Publication right will often override the first of the bullet points listed.

Unpublished anonymous paintings remain in copyright until at least 1 January 2040. This tag does not apply to engravings or musical works. More information.

Warning sign You must also include a United States public domain tag to indicate why this work is in the public domain in the United States.