|Poppies, by Claude Monet. In general, paintings prior to the 20th century are in the public domain due to expiration of copyright, which means you can use images of them freely in educational materials. For works of art created in the 20th century, normally you cannot reuse any copies. Click on the image for a full size version which you can freely re-use and modify. Print it and use it for your lessons, integrate it into your pages on Wikiversity, or use it in other learning resources and websites. Use the links below to find more images like this one.