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.

For background information, see the explanations on Non-U.S. copyrights.
As of 1 January 1996, the following were in the public domain in Portugal: works whose author died before 1946; anonymous works, works deemed to be anonymous, or works by a collective person whose authors were not individually identified, first published or disclosed before 1946; photographic works, works deemed to be photographic works or works of applied art created before 1 July 1970; news articles or economic, political or religious articles, published or disclosed before 1996, provided that rights have not been specifically reserved and mentions, wherever possible, the name of the author and of the publisher, of the title of the work and other elements enabling it to be identified.