Wikimedia Commons has media related to PD-author.

To place a file in this category, add the tag ((PD-author)) to the bottom of the file's description page. If you are not sure which category a file belongs to, consult the file copyright tag page. If this category is very large, please consider placing your file in a new or existing subcategory. Free files can be moved to the Wikimedia Commons.

Note that this tag is specifically for items that you know FOR CERTAIN to have been released into the public domain by their creators — not for images that have entered PD due to copyright expiration (use ((PD-US)) or another appropriate tag), nor images that you have created yourself (use ((PD-self))). Please include all evidence you have that creator desires the image to be public domain on the image description page. IMPORTANT - if the copyright holder sent you a statement of permission in personal correspondence, please forward that statement to the Volunteer Response Team at "permissions-en AT wikimedia DOT org" so that it can be logged for future reference.