Rights and takedowns

• Works made by 1930, by artists who died by 1955. These are out of copyright in the United States, and in the countries that protect art for the artist's life plus 70 years.
• Later works only when they never had a copyright, or their museum says so. Works made by the United States government, such as World War II and WPA posters and NASA's images, have no copyright. A few later works come from museums that release them as public domain through their open-access programs.
• What we leave out: works by artists who died after 1955, even when a museum releases them in the United States; works that are free only if a copyright notice or renewal was missed; works with a copyright notice printed on them; and works whose main feature is a trademark still in use, such as a magazine's masthead.

Our images come from museums' open-access programs (The Metropolitan Museum of Art, the National Gallery of Art, the Art Institute of Chicago, The Cleveland Museum of Art, the Smithsonian, the Walters Art Museum and SMK, the National Gallery of Denmark), the Library of Congress, NASA, the U.S. Navy Art Collection, and Wikimedia Commons, where we use only files marked public domain or CC0.

A faithful photograph of a flat work, such as a painting, drawing or print, adds no copyright of its own: in the United States since Bridgeman v. Corel (1999), and in the European Union under article 14 of its 2019 copyright directive. We don't sell photographs of sculpture or other three-dimensional objects, and we leave out images whose photographer claims a license.

Space images made by NASA with the European Space Agency carry ESA's Creative Commons Attribution 4.0 license, and we show their credit with each one. NASA doesn't endorse EulerBloom or its prints, and we don't use NASA's logos or insignia.

A few works that are free in the United States are still protected in countries with longer terms. Mexico, for example, protects art for 100 years after the artist's death. We don't ship those works to those countries.

Works held in Italy's or Mexico's collections are not shown or sold in those countries, whose cultural heritage laws govern their reproduction there.

Please write to us first. We would rather fix a mistake quickly than argue about it. Send mason@eulerbloom.com:

• the link to the work on eulerbloom.com;
• what you own or represent, and why: for example, that you are the artist or an heir, or that you hold the copyright registration;
• your name and how to reach you;
• a statement that you believe in good faith that our use isn't authorized.

We take the work down while we look into it and reply within one business day. If our record shows the work is free to sell, we'll send it to you, with the sources it rests on, before we put the work back. If you are right, it stays down.