This image is in the public domain in Denmark because the DanishConsolidated Act on Copyright of 2010 specifies (§91, 5) that all photographic images not considered to be "photographic works" that were created before 1 January 1970 are exempt from protection (details).
Note that "photographic works", which must display artistic merit or originality, enter the public domain 70 years after the death of the photographer and that photographs that are not considered works but created 1 January 1970 or later become public domain 50 years after they were created. See Licensing for details.
Some countries have a lower threshold of originality and may therefore apply a longer protection term for this image, so it may not be usable in such countries.
To uploader: For this to be applicable, creation year must be known (or known to be at least before 1970)
You must also include a United States public domain tag to indicate why this work is in the public domain in the United States.
This image (or other media file) is in the public domain because its copyright has expired and its author is anonymous. This applies to the European Union and those countries with a copyright term of 70 years after the work was made available to the public and the author never disclosed their identity. Important: Always mention where the image comes from, as far as possible, and make sure the author never claimed authorship.
Note: In Germany and possibly other countries, certain anonymous works published before July 1, 1995 are copyrighted until 70 years after the death of the author. See Übergangsrecht. Please use this template only if the author never claimed authorship or their authorship never became public in any other way. If the work is anonymous or pseudonymous (e.g., published only under a corporate or organization's name), use this template for images published more than 70 years ago.For a work made available to the public in the United Kingdom, please use Template:PD-UK-unknown instead.
Uploaded a work by Unknown - per https://arkiv.dk/en/vis/6181956 from http://www.dovehistoriskselskab.dk/wp-content/gallery/personer-forchammer-georg/1910-Forchhammer-Georg.jpg with UploadWizard
File usage
The following pages on the English Wikipedia use this file (pages on other projects are not listed):