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Apollo Slaying Python, plate one from The History of Apollo and Daphne
From the collection of Art Institute of Chicago. Free to download, adapt and use — no permission needed.
Credit lineApollo Slaying Python, plate one from The History of Apollo and Daphne. c. 1532. Master of the Die (Italian, active c. 1530-1560), after Baldassare Peruzzi (Italian, 1481-1536). The Art Institute of Chicago, The Wallace L. DeWolf and Joseph Brooks Fair Collections. CC0.