This public domain image depicts the god Dionysos seated with a panther. Dionysos, the god of wine, is known as Bacchus by the Romans.
The image comes from page 55 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).