All images of public-domain artworks in the Metropolitan Museum of Art’s collection — about 375,000 — are now free for anyone to use however they may please . . .
Young Man Approaching Old Bearded Man Who Stands on Steps (recto); Male Nude with Bent Right Knee (verso)
I thought this piece was interesting because it took me a while to identify where the male nudity was. The clue is in the black chalk underdrawing (recto). Goes to show how much I know about art.