I am looking for images of chess players, pieces, as well as any other graphics related to chess - public domain only.
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1Wikipedia tends to have lots of public domain pictures. – Tony Ennis Dec 26 '12 at 4:44
Creative Commons search might be a good place to start:
http://search.creativecommons.org/
It allows you search other sites such as Flickr and Google Images, while making sure you can legally use what you find.
http://www.chess.com/forum/view/general/greatest-chess-photos
Has probably some of the most epic pictures in chess history