(1-1) Private collection. Photo: Peter Willi/Bridgeman Art Library. (1-2) Biblioteca Herziana, Rome. Photo: Scala. (2-1) Hulton Getty. (2-2) Photo: AKG London. (2-3) Hulton Getty. Etching by Johann Heinrich Lips after an anonymous portrait of 1765. (2-4) Stadtgeschichtliches Museum Königsberg. Photo: AKG London. (2-5) Kant Society. Photo: AKG London. (3-1) Galleria Palatina, Florence. Photo: Scala. (3-2) Hulton Getty. Drawing by Spy, from The Statesman No. 141. (4-1) Hulton Getty. (4-3) The Louvre. Photo: Giraudon/Pix. (4-4) Printed with permission of the director of the Husserl Archives in Leuven, Professor Rudolf Bernet. (4-5) © Robert Holmes/Corbis. (5-1) The Louvre. Photo: Peter Willi/Bridgeman Art Library. (5-2) © Bettmann/Corbis. (6-1) © Archives of Scientific Philosophy. Reproduced by permission of the University of Pittsburgh. All rights reserved. (6-2) © Pressens Bild AB. (6-3) Musée des Beaux-Arts de Nancy. Photo © G. Mangin. (8-1) Moderna Museet, Stockholm. © DACS 2000.

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