Worldwarera.com /.se sells posters/prints with art that either NO longer is covered by copyright AND / OR where the artist is unknown / anonymous and that decision due therefore presently is missing for whether or not the copyright still is valid or not, despite reasonable research efforts on part of Worldwarera.com. Some motifs are also published by power or state that no longer exists, why no copyright claims exist. In addition, materials published by the U.S. Government Printing Office are in the public domain and, as such, not subject to copyright restriction. Copyright license has been procured on WorldWarEra.com:s part for art not covered by above paragraphs. If you have any information regarding an author / artist or relatives to such with legal / creator claims please contact us so that we can make contact for a mutual agreement.