Author-date citations are not normally used to cite images (see How do I cite an image?) Instead, put the information about the image into a caption or in parentheses in the text of your paper.
If a reference list is required, please see below.
Artist or creator Last Name, First Name. Year of Creation or Completion. Title of Work. Medium. Dimensions (if applicable). Museum Name, Museum Location (if applicable). http://xxxxxxxxxxx.
Matisse, Henri. 1905. The Open Window. Oil on canvas. 55.3 x 46 cm. National Gallery of Art, Washington D.C. https://www.https://www.nga.gov/collection/art-object-page.106384.html.
Le Corbusier. 1943. Club de Centre Rural: Perspective Sketch. Art Institute of Chicago, Chicago. https://library.artstor.org/#/asset/AWSS35953_35953_41726393.
(Matisse 1905)
Matisse (1905) illustrates this …