Image captions should include both the location of the work of art itself, as well as the location of where you found the image. Below is an example of an image from the Metropolitan Museum of Art's collection and how you would cite it depending on where you found the image.
Title: Josephine Baker
Artist: Adolph de Meyer
Date: 1825 - 1826
Medium: Direct carbon print
Location of work: Metropolitan Museum of Art
Fig. 1. Adolf de Meyer, Josephine Baker, 1825 - 26. Direct carbon print. Metropolitan Museum of Art.
Fig. 1. Adolf de Meyer, Josephine Baker, 1825 - 26. Direct carbon print. Metropolitan Museum of Art. metmuseum.org.
Fig. 1. Adolf de Meyer, Josephine Baker, 1825 - 26. Direct carbon print. Metropolitan Museum of Art. The New Vision: Photography between the World Wars, Ford Motor Company Collection at the Metropolitan Museum of Art​. By Maria Morris Hambourg. New York: Metropolitan Museum of Art, 1989.