De Agostini Picture Library/age fotostock: 3.1; © akg-images: 2.2, 4.6, 4.7; Wartburg Castle Museum/© akg-images: 4.9; © epa european pressphoto agency b.v./Alamy Stock Photo: 5.5; © Granger Historical Picture Archive/Alamy Stock Photo: 1.1; © INTERFOTO/Alamy Stock Photo: 5.3; © Moviestore Collection Ltd/Alamy Stock Photo: 5.4; © British Library/Bridgeman Images: 4.5; Staatliche Museen zu Berlin/© Mary Evans/Süddeutsche Zeitung Photo: 4.8; © Imagno/Getty Images: 1.2; Heidelberg University Library (CC-BY-SA 3.0): 3.2; The Internet Archive: 4.3; Archiv der Lippischen Landeskirche (Archive of Church of Lippe), Bestand 01.01 Nr. 1587: 5.1; Luther Memorial Foundation in Saxony-Anhalt: 4.1, 5.2; The Metropolitan Museum of Art, New York, Gift of Felix M. Warburg, 1920/www.metmuseum.org: 2.1; © 2016 Scala, Florence/bpk: 4.1; © Barry Stephenson: 4.2; Universitäts- und Landesbibliothek Sachsen-Anhalt: 3.3; Kunstsammlungen der Veste Coburg, Germany/www.kunstsammlungen-coburg.de: 4.4