Source: New York Public Library

New York Public Library

With nearly 53 million items, the New York Public Library is the second largest public library in the United States (and third largest in the world), behind only the Library of Congress. Although images via its site are under a non-commercial license, they have some openly licensed material available through the Internet Archive and also images with "no known copyright restrictions" available through Flickr: The Commons.

Visit The New York Public Library set on Flickr: The Commons and their Internet Archive page

Other Sources

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