In the last year The Library of Congress has published much of their photography collection online. You can spend days looking through the images, and if you wish to make a print they offer high resolution files. The Library of Congress has now gone a step further by posting two of their most popular archives on Flickr. The links to both are listed below.
These vivid color photos from the Great Depression and World War II capture an era generally seen only in black-and-white. Photographers working for the United States Farm Security Administration (FSA) and later the Office of War Information (OWI) created the images between 1939 and 1944.
This selected set of 1,500 photographs is from a large collection of almost 40,000 glass negatives. The entire collection spans 1900-1920 and richly documents sports events, theater, celebrities, crime, strikes, disasters, and political activities, with a special emphasis on life in New York City.