ArtStor is probably Princeton's most robust digital image database available, although we have access to others under the first link on left below. ArtStor hosts Department of Art & Archaeology content in addition to the native Digital Library, as well as lots of open-access images. Princeton affiliates: for help with or questions about ArtStor, contact firstname.lastname@example.org and/or email@example.com .
Visit the University's Copyright page for guidance. Additional information about copyright and using images may be found on the Visual Resources Collection's (Dept. of Art & Archaeology) website (see Copyright on the left-hand side), the Visual Resources Association IPR and Copyright page, and the College Art Association site.