|A Cow Grazing|
Adriaen van de Velde
Image Source: J. Paul Getty Museum
Use the Getty Search Gateway to find images in the Getty Museum's Open Content Program. The Getty Search Gateway allows you to filter your search according to material type, topic, name, source, and location. Once you find an image, click the image's title to be taken to its landing page where you can learn more about it, get the required attribution information, and learn more about the history of your chosen image.
Applications for Education
The Getty's Open Content Program could be a good source of images to use in art history lessons. The Getty Search Gateway could also be a good place for students to find images to use in multimedia presentations. In fact, I'm going to add it to my list of recommended places for students to find free images.
H/T to Open Culture and Larry Ferlazzo.