License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Isoda Koryūsai. The Courtesan Nanakoshi of the Ōgiya Brothel, from the series “A Pat-tern Book of the Year’s First Designs, Fresh as Spring Herbs” (“Hinagata wakana no hatsu moyō”), 1777–78. The Metropolitan Museum of Art.