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The Messier Catalog
Astronomical pictures of Messier deep space objects (nebulae, clusters, galaxies, etc.) which are mostly public domain for private use. Some of the pictures, however, are under copyright, as indicated by a tag on the picture. Each picture has textual information to accompany it.
Collections of public domain posters. The categories include World War, WPA, Graphic Arts, and Performing Arts. You may search by keyword, but the site uses a custom Google search. Thus, browsing by category may be more efficient.
Images (mostly prints and drawings) from old magazines, books, and other print media, which are all public domain in the United States. Search by category or use the advanced search option.
U.S. History Images
Around 5,000 images pertaining to the Civil War era (up to the middle of 1862). It is easiest to search images on this site by narrowing down the category. Categories pertain to many topics beyond the actual Civil War, such as transportation during that period, frontier life, and Native American culture.
The Public Domain Review
Unusual and interesting images from out-of-copyright sources (magazines, illuminated manuscripts, books, etc.). The content is varied and ranges from Bestiaries to anatomy to futuristic drawings. You may search by category or time period.
*Note: While the images are public domain, the the essays
written for The Public Domain Review
are under a Creative Commons license. Read the usage policy
for more information.
Public Domain Images
Public domain images: remix, redistribute, and use without restriction or permission!
Free photos for commercial and private use - no attribution necessary. Some photos may come from other websites, such as Shutterstock, which may not fall under public domain - check each photo to ensure that it is public domain.
Photos Public Domain
Search public domain clip art and photos by category. All photos on this site were taken by the author and released as public domain.
The Picdrome gallery is divided by categories (e.g. Abstract, Food & Drink, Nature, Technology, etc.). You may also search for specific images, but the search will take you to a custom Google search of Picdrome, which makes viewing the photos a bit more difficult.
Search photos and clip art by category or key word.
Photos are in the public domain, but the author asks that you credit/link back to the site. Many of the photos on the site seem to be unique to India, though the collections may also be universal.
Browse images under categories such as medical, advertisements, people, sports, space, etc.
Public Domain Images
Browse by category or search for images. Varied categories; the site also includes vintage photography and space images.
"All photos published on Unsplash are licensed under Creative Commons Zero which means you can copy, modify, distribute and use the photos for free, including commercial purposes, without asking permission from or providing attribution to the photographer or Unsplash."
Free images for personal and commercial use.
Other General Links
These links have fewer photos in their galleries but may still be a good source to check if you have exhausted the other links.
A Clip Art History
Clip art of historical matters from prehistoric to present day. It may be easier to search by the time period and narrow down the categories rather than search by a specific keyword (more general searches, such as "egypt" or "abraham lincoln" do work well). Site discontinued.
Christmas Graphics PLUS
Holiday-themed clip art and animated graphics (not just Christmas).
Browse the clip art by class subject - the clip art is more educational and classroom themed.
Open Clip Art
This site allows you to search clip art images and collections, which are uploaded by various artists. These images may be downloaded and edited. If you choose to edit the image, you can do so on the site - add text, change colors, add shapes and stickers, re-size, enhance, etc. The altered image can then be downloaded onto your computer.
Free educational clip art (either created by the author of the site or collected from another public domain site). The images are not searchable, but the categories are self explanatory.
Large collection of clip art images and some photos. You can narrow down by category or search for a specific image.