Illustration of "Portrait of a Noblewoman"

Illustration of Alonso Sanchecz Coello's "Portrait of a Noblewoman (called the Girl in Red)," from "The Rita Lydig collection, catalogued by Wilhelm R. Valentiner, with the assistance of Durr Friedley." This painting was attibuted to Coello at the printing date of this catalogue but this attibution was dismissed a few years later and remains unknown today.