This shot is pretty small to see but it's of Marie Antoinette as a child (third from the left) in a painting by her much older sister Archduchess Marie Christine who was the mother, Empress Maria Theresa's favorite.
Not shown is MA's favorite sister Maria Carolina who grew up to be Queen of Naples. She and MA were very close as children and they kept in touch by letter all their lives. MC's granddaughter Archduchess Marie Louise of Austria ended up marrying Napolean. The beauty of monarchy is we're all connected!!!