File:Wojkowice Jowisz Coal Mine.jpg
scanned from: Album objektów Towarzystwa Górniczo-Przemysłowego "Saturn", 1930
Silesian Digital Library (Śląska Biblioteka Cyfrowa)
https://www.sbc.org.pl/dlibra/publication/19454/edition/17049/content?ref=desc
Author
Unknown author
Licensing
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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.
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This photograph is in the public domain because according to the Art. 3 of copyright law of March 29, 1926 of the Republic of Poland and Art. 2 of copyright law of July 10, 1952 of the People's Republic of Poland, all photographs by Polish photographers (or published for the first time in Poland or simultaneously in Poland and abroad) published without a clear copyright notice before the law was changed on May 23, 1994 are assumed to be in the public domain in Poland.
This work is in the public domain in the United States because it meets three requirements:
To uploader: Please provide where and when the image was first published.
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