The Artist's Sister, Marie von Kalckreuth by Galerie Gerda Bassenge, Koenigs, Anne, Bruce Fund, Ailsa Mellon, Koenigs, Kornelia van Eyck, Kalckreuth, Leopold von, National Gallery of Art, Bellinger, Katrin, Ms., Stiftung Ratjen, Boerner LLC, C.G., Ratjen, Wolfgang — VisualArtsDB

The Artist's Sister, Marie von Kalckreuth by Galerie Gerda Bassenge, Koenigs, Anne, Bruce Fund, Ailsa Mellon, Koenigs, Kornelia van Eyck, Kalckreuth, Leopold von, National Gallery of Art, Bellinger, Katrin, Ms., Stiftung Ratjen, Boerner LLC, C.G., Ratjen, Wolfgang — VisualArtsDB