License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Gilles Rousselet. Arithmetic: a young woman standing at a table, holding a sheet with inscribed numbers in her right hand, in a decorated interior, from "The liberal arts" (Les arts liberaux), 1633–35. The Metropolitan Museum of Art.