LONDON Sotheby's
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LONDON Tate Gallery
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LONDON Waddington Custot
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LONDON Whitechapel Art Gallery
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LONDON Wiener Library
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LOS ANGELES Cantor Foundation
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LOS ANGELES County Museum of Art (LACMA)
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LOS ANGELES Frederick S. Wight Gallery
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LOS ANGELES Getty Research Institute (LA-GETTY)
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LOS ANGELES Modern Institute of Art
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LOS ANGELES Tishman West Management Corp.
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LOS ANGELES University of California
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LOUISVILLE Speed Art Museum
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LUDWIGSHAFEN Wilhelm-Hack-Museum
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LUGANO Galleria Henze
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LUGANO Villa Favorita
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LUGANO Villa Malpensata
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LUXEMBURG Nationalmuseum
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LUZERN Galerie Fischer
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LUZERN Galerie Thannhauser
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LUZERN Kunstmuseum
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LYON Musée des Beaux-Arts
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LÜBECK Museum Behnhaus Drägerhaus
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LÜBECK Museum für Kunst und Kulturgeschichte
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LÜBECK Overbeck-Gesellschaft
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LÜTTICH Musée des Beaux-Arts
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MADISON Union Gallery
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MADRID Fundación Caja de Madrid
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MADRID Fundación Juan March
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MADRID Museo Thyssen-Bornemisza
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MADRID Museum Reina Sofía
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MADRID Nationalbibliothek
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MAGDEBURG Deutsches Zentrum Kulturgutverluste
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MAGDEBURG Kunstverein
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MAILAND Fondazione Antonio Mazzotta
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MAILAND Palazzo Reale
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MAILAND Palazzo della Permanente
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MAINZ Akademie
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MAINZ Landesmuseum
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MALMÖ Konsthall
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MALTA Transarte Ltd.
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MANHATTAN Kansas State University
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MANNHEIM Galerie Probst
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MANNHEIM Kunsthalle
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MANNHEIM Kunsthaus
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MANNHEIM Reiß-Engelhorn-Museen
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MANSFIELD University of Connecticut
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MARBACH AM NECKAR Deutsches Literaturarchiv (MAN-LITARCHIV)
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MARBURG J. A. Stargardt
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MARTIGNY Fondation Pierre Gianadda
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