Provides over 1.5 million digital images in the arts, architecture, humanities, and sciences with an accessible suite of software tools for teaching and research. Community-built collections include contributions from museums, photographers, libraries, scholars, photo archives, and artists and artists' estates.
Provides open access to over 700,000 images digitized from the The New York Public Library's vast collections, including illuminated manuscripts, historical maps, vintage posters, rare prints, photographs.
DPLA connects people to the riches held within America’s libraries, archives, museums, and other cultural heritage institutions. All of the materials found through DPLA—photographs, books, maps, news footage, oral histories, personal letters, museum objects, artwork, government documents, and so much more—are free and immediately available in digital format.
A site from the Library of Congress's Chronicling America project that lets you search through newspaper photographs for certain keywords. You can narrow it down to a certain date range from 1900-1963 and all images are in the public domain.