Ellen Prokop is the Associate Photoarchivist at the Frick Art Reference Library in New York. She is the author of several articles on early modern Italian and Spanish art, including “Painting from Memory: A Pietà by Fray Juan Ricci” in Art in Spain and the Hispanic World: Essays in Honor of Jonathan Brown (2010). Prokop teaches courses and seminars at New York University and Hunter College of The City University of New York.