This public domain image depicts the goddess Diana (or, Artemis) with a stag. Diana, the goddess of the moon and the hunt, is known as Artemis by the Greeks.
The image comes from page 94 of "Mythology: Illustrated Chiefly from the Myths and Legends of Greece (Chambers's Elementary Science Manuals) by A.S. Murray (Senior Assistant in the Department of Greek and Roman Antiquities, British Museum). Published by W. & R. Chambers, London and Edinburgh (1876)". Image source: First scanned by Google Books (books.google.com). Find more of my stuff on TpT.