License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
John of Calcar (John Stephen Calcar). Portrait of Andreas Vesalius, half-length in profile standing in front of a table dissecting the arm of a body; frontispiece to Andreas Vesalius 'De humani corporis fabrica libri septem', 1542. The Metropolitan Museum of Art.