Click through for a list of Image Databases provided by the Hunter College Libraries. You can access any of these by logging in with your NetID/password when prompted: https://library.hunter.cuny.edu/databases/type/8
Below are a few highlights, from Hunter as well as free, publicly accessible online resources.
ARTstor <click here to access the database - log in with your Net ID and password when prompted
ARTstor is a digital library of more than two million images in the arts, architecture, humanities, and social sciences with a suite of software tools to view, present, and manage images for research and pedagogical purposes.
The Metropolitan Museum of Art Collections: https://www.metmuseum.org/art/collection
Museum of Modern Art (MoMA) Collections: https://www.moma.org/collection/
New York Public Library Online Collections (a selection):
Creative Commons Search: https://ccsearch.creativecommons.org/
Digital Public Library of America: https://dp.la/
Google Arts & Culture: https://artsandculture.google.com/