Website:
Main site – http://search.getty.edu/gateway/landing
Open-Content Images – http://search.getty.edu/gateway/search?q=&cat=highlight&f=%22Open+Content+Images%22&rows=10&srt=a&dir=s&pg=1
Conditions:
The Getty makes available, without charge, all available digital images to which the Getty holds the rights or that are in the public domain to be used for any purpose. No permission is required.
Open content images can be used for any purpose without first seeking permission from the Getty. Images of many other works in the collections are also on our website in varying formats. The Getty supports fair use of images when the applicable legal criteria are met.
While there are no restrictions or conditions on the use of open content images, the Getty would appreciate a gratis copy of any scholarly publications in which the images are reproduced in order to maintain the collection bibliography.
Source: http://www.getty.edu/about/opencontent.html
(via @DervMac)
