Luna includes CCS Images for Teaching and Research and The Detroit Institute of Arts Image Collection. In total, the Luna collections contain over 50,000 twentieth-century images, and over 25,000 twenty-first century images; anyone with CCS credentials has access.
The Artstor Public Collections (not to be confused with the Artstor subscription collection) are a freely accessible library of images and other media. All of these collections have been made available by the institutions that manage them in order to allow broader access.
Morning by Maxfield Parrish, 1922
Behold the Vine Was Before Me by Saul Tepper, 1934