If you’re looking for pictures of medieval times or old drawings in general, you’ll make a find at Old Book Art.com. But the best thing is that all the pictures provided there are free to use. Why, how?
The mission of Old Book Art
To provide & facilitate access to free illustrations: pictures, drawings, maps and other images scanned from antiquarian, public-domain books and other old documents. We have over 4,700 images in our gallery with more added regularly, all at no cost and most available at very high resolution. Most of these we have scanned or edited ourselves. We will also screen and provide links to other high quality resources.
These are just a few findings which could be useful for roleplayers: