Andrew Aitchison: 62; akg-images: 81, 116; akg-images/Stefan Drechsel: 252 (left); Alamy/Gari Wyn Williams: 94; Archconfraternity of San Giovanni Decollato, Rome: 218 (left); Archivio Fotografico Messaggero S. Antonio Editrice/Giorgio Deganello: 126; Arktos: 250; Axiom/Timothy Allen: 24; Richard Baker: 100, 104, 146, 151, 152, 154, 157, 288; Every Word Unmade, 2007, by Fiona Banner, courtesy of the Artist and Frith Street Gallery, London: 214; from Brigitte et Bernard © Audrey Bardou: 216 (below); from The Roman Missal, 1962 © Baronius Press, 2009: 38; Nathan Benn: 54; Jean-Christophe Benoist: 16; © Bibliothèque Nationale de France: 149; Big Pictures: 187; Bridgeman Art Library/Bibliothèque Nationale, Paris: 302; Bridgeman/British Library, London: 72; Bridgeman/Chiesa del Gesù, Rome: 252 (right); Bridgeman/Church of the Gesuiti, Venice/Cameraphoto Arte Venezia: 10; Bridgeman/Duomo, Siena: 42; Bridgeman/Fitzwilliam Museum, University of Cambridge: 141; Bridgeman/Galleria degli Uffizi, Florence: 169, 216 (above); Bridgeman/Galleria dell' Accademia Carrara, Bergamo: 174; Bridgeman/Hermitage, St Petersburg: 238 (below); Bridgeman/Neil Holmes: 265; Bridgeman/© Isabella Stewart Gardner Museum, Boston: 234; Bridgeman/Musée des Beaux-Arts et d'Archéologie, Besançon/Giraudon: 223 (above); Bridgeman/Musée du Louvre, Paris/Giraudon: 211, 232; Bridgeman/Museo di San Marco dell'Angelico, Florence/Giraudon: 236 (above); Bridgeman/Musée d'Unterlinden, Colmar: 220; Bridgeman/National Museum of Bosnia and Herzegovina, Sarajevo/Photo © Zev Radovan: 47; Bridgeman/Noortman Master Paintings, Amsterdam: 184; Bridgeman/Prado, Madrid: 230 (above); Bridgeman/Private Collection: 118; Bridgeman/St Peter's, Vatican City: 228 (above); Bridgeman/Scrovegni Chapel, Padua: 86; by kind permission of the Syndics of Cambridge University Library: 92; Camera Press, London/Butzmann/Laif: 36; © Nicky Colton-Milne: 49; from the Garden Ruin serics © François Coquerel: 223 (below); Corbis/Robert Mulder/Godong: 60; Corbis/Bob Sacha: 130; Jean-Pierre Dalbéra: 308, 309; Fczarnowski: 170; Peter Aprahamian/Freud Museum, London: 97 (below); Gabinetto Fotografico Nazionale, Rome: 218 (right); from the Remember Me series © Preston Gannaway/Concord Monitor: 228 (below); Getty Images: 236 (below), 249, 286; Thomas Greenall ＆ Jordan Hodgson: 45, 67, 89, 97 (above), 123, 177, 193, 204—5, 226, 245, 262, 266, 274, 284, 290 (below): Dan Hagerman: 295; from The Sunday Missal © HarperCollins, 1984: 134; istockphoto.com: 270 (above); Rob Judges: 107; New York, c. 1940, by Helen Levitt © Estate of Helen Levitt, courtesy Laurence Miller Gallery, New York: 230 (below); Linkimage/Gerry Johansson: 22; Red Slate Circle, 1987 by Richard Long. Courtesy of the Artist and Haunch of Venison, London © Richard Long. All Rights Reserved. DACS, 2010: 241 (below); © Mazur/catholicchurch.org.uk: 31, 34, 40, 225 (below); Mary Evans Picture Library: 64; © Museum of London: 270; Naoya Fujii: 260; PA Photos/AP/Bernat Armangue: 52; PA Photos/Balkis Press/Abacapress: 293; Panos Pictures/Xavier Cevera: 110; John Pitts: 270 (below); from Contrasts, 1841, by A.W.N. Pugin: 256; Reuters/Yannis Behrakis: 190; Reuters/STR: 297; Rex Features: 89 (inset), 144; Lucienne Roberts ＆ David Shaw: 76, 290 (above); Scala/Art Institute of Chicago: 177 (inset); Scala/Pierpont Morgan Library, New York: 114, 128; Scala/White Images: 238 (above); Untitled—October 1998, by Hannah Starkey, courtesy Maureen Paley, London: 28; Mathew Stinson: 172; National Gallery I, London 1989 by Thomas Struth, courtesy of the artist and Marian Goodman Gallery, New York/Paris © Thomas Struth: 212; Westminster Cathedral, London: 225 (above); Katrina Wiedner: 140, 269.