License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Torii Kiyonaga. The Courtesan Wakakusa of the Chōjiya Brothel, and Attendants Asano and Midori, from the series “A Pattern Book of the Year’s First Designs, Fresh as Spring Herbs” (Hinagata wakana no hatsumoyō), ca. 1783. The Metropolitan Museum of Art.