Image and Data Resources | The Metropolitan Museum of Art
►http://www.metmuseum.org/about-the-met/policies-and-documents/image-resources
On February 7, 2017, The Metropolitan Museum of Art implemented a new policy known as Open Access, which makes images of artworks it believes to be in the public domain widely and freely available for unrestricted use, and at no cost, in accordance with the Creative Commons Zero (CC0) designation and the Terms and Conditions of this website.
It also makes available data from the entire online collection―both works it believes to be in the public domain and those under copyright or other restrictions―including basic information such as title, artist, date, medium, and dimensions. This data is available to all in accordance with the Creative Commons Zero (CC0) designation.
That’s about 375k images, many beautiful (I think in total CC0 and ©, but still…).