Art resources online

[AhnoldZ]

Dwardio posted about a year ago that the Met also offers open access to their collections as well:

Got Art? The Met offers Open Access to collections

As of [Tuesday (2/7/2017)], all images of public-domain works in The Met collection are available under Creative Commons Zero (CC0). So whether you’re an artist or a designer, an educator or a student, a professional or a hobbyist, you now have more than 375,000 images of artworks from our collection to use, share, and remix—without restriction.