New York Public Library's Digital Gallery
digitalgallery.nypl.org
Lose yourself in this vast collection of rare prints, vintage maps, manuscripts, posters, photographs, sheet-music covers, dust jackets, menus, cigarette cards and other artifacts. There are more than 300,000 digital images of original materials available for viewing. Access is free, and you can download images to your computer for personal or research use. The My Digital page will store your favorite discoveries along with your search history.