There are many excellent Library sources for images that can be found in our catalog and databases, as well as freely available on the internet. When including images in research papers or presentations, be sure to cite them properly, as the image here is cited:
Artist's name [institution if no personal name]. "Title of Image." Date of creation [or N.d. if not dated]. Source of image [add City if physical version of the image is in an institution; add City: Publisher if the image was originally in a book]. URL.
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Print Collection, The New York Public Library. "'Arthur, King of Britain'. From the Maximilian Tomb." N.d. The New York Public Library Digital Collections. http://digitalcollections.nypl.org/items/510d47dc-5026-a3d9-e040-e00a18064a99