License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Gilles Rousselet. Grammar: a young woman standing in a decorated interior holding an open book in her left hand and pointing to the alphabet inscribed on its pages with her right hand, from the series 'The liberal arts' (Les arts liberaux), 1633–35. The Metropolitan Museum of Art.