Of the five paintings considered by Friedländer, three are in the United States, at the Philadelphia Museum of Art, Minneapolis Institute of Arts, and Clark Art Institute, and the other two in Europe, at the Groeningemuseum, Bruges, and the Musée des Beaux-Arts, Lille.
Among five paintings analyzed by Friedländer, three are found in the United States, at the Philadelphia Museum of Art, Minneapolis Institute of Arts, and Clark Art Institute, while the other two are located in Europe, at the Groeningemuseum in Bruges and the Musée des Beaux-Arts in Lille.