Collections are focused on 19th and earlier 20th century works, but great for finding primary sources (like original catalogs, archival documents, etc).
Other Images & Primary Source Collections
These library databases and public (online) sources provide high-quality digital images for research and coursework. (If you're looking to publish or print something, though, be sure to review our resources on Understanding Copyright.)
Access nearly a million images digitized from primary sources and printed rarities in the collections of The New York Public Library, including illuminated manuscripts, historical maps, vintage posters, rare prints, photographs, illustrated books, printed ephemera, and more. Tutorial for the New York Public Library Digital Library.