When you include a work of art in your paper/presentation/blog post, you'll want to include a caption. You can use a short caption and put the full citation in your Works Cite page, or you can put the full citation with the image (with commas instead of the usual punctuation) and leave it out of your Works Cited page.
For more information about how to caption images/figures and tables in MLA 8th edition visit this Owl Purdue page.
(works of art that exist in a museum or gallery somewhere)
We'll use Man Ray's Self-Portrait Assemblage as an example. How you cite a work of art changes depending where you found it. You include information about the artwork and then information about where you found it. You can find information about works of art in Artstor.
Citing Digital Images
(images that only exist digitally, and are not found in a museum somewhere)
Are you trying to cite a speech, TV show, movie, etc.? Check out this Owl Purdue Guide!