ARTstor is a non-profit initiative, founded by The Andrew W. Mellon Foundation, with a mission to use digital technology to enhance scholarship, teaching and learning in the arts and associated fields. The ARTstor Digital Library Charter Collection is:

• A repository of hundreds of thousands of digital images and related data;
• The tools to actively use those images; and
• A restricted usage environment that seeks to balance the rights of content providers with the needs and interests of content users.