Downloadable Images & Photos

New York Times Historical Archive
Chicage Tribune Historical Archive
History Resource Center (U.S.): maps, photographs, video clips of historical events.
History Resource Center (World)

Websites

Digital History
National Geographic Photos
Pictures of the Year
Picturing the Century: 100 years of photography from the National Archives
American Memory: photos from the Library of Congress

Search for Royalty free photos
Public Domain images