The New York Met Museum digitised their collection under the Creative Commons Zero (CC0) licence.
Yes, you read that headline correctly. Many of the 375,000 images are free for use without any cost or restrictions and come from the late 19th century when photography was in its infancy and back when albumen silver prints were in use. They were the first commercially exploitable method of producing a photographic print on a paper base from a negative and paved the way for photographic materials like celluloid.
Resources like this are really helpful for people without access to museums or the means to reach them in their local areas. Creative Commons was created for purposes like this and it’s great to see the Met taking part.
(via DIY Photography)