Last month, Yale University and the Library of Congress made over 170,000 photographs from across the United States available for browsing through a new program called Photogrammar. The photos were taken from 1935 to 1945 by photographers commissioned by the U.S. Farm Security Administration and Office of War Information to document life during the Great Depression and World War II. After being housed at the Library of Congress for decades, they're now accessible to the public via an interactive map and searchable database created at Yale.

The map is extremely interesting as it allows you to browse by location, zooming in to the Parish level (or to almost any other location in the U.S.). Southern Louisiana is very well-documented, with 224 pictures from Orleans Parish, 112 from Terrebonne, 93 from Ascension, and a smattering of anywhere from 4-40 from the other parishes surrounding Orleans.

You can also search by photographer name. Many well-known photographers of the era, including Dorothea Lange, Walker Evans, and Arthur Rothstein contributed.

Access the photographs here.

Learn more about the project here.