The British Library recently uploaded over one million public domain images from the 17th, 18th, and 19th centuries to Flickr! The images, like the one below, are freely available to use, remix, and re-purpose. That’s a lot of images!
This is the newest digitization effort from the British Library, which also recently made available thousands of historical manuscripts online, including a notebook from Leonardo Da Vinci and the oldest known copy of Beowulf.