Acknowledgements: Collection RKD / Netherlands Institute for Art History, Creative Commons - Wikipedia, Ebay, Google Books, Interencheres - La Gallerie de Chartes, J. Paul Getty Museum, Jefferson Stereoptics, Metropolitan Museum of Art, Musée d'Art Moderne et Contemporain, Museum Ludwig, National Gallery of Canada / Musée des beaux-arts du Canada, Private collection of David Likar, Sotheby's - Paris, Stereoviews: Stereoviews and Fine 19th & 20th Century Antique Photographs, Swann Galleries - New York, Victoria and Albert Museum. |