Rachael Dillon Fried and Stephanie Delman at Sanford J. Greenburger Associates for everything they do both here and abroad.
The exceptional minds of Dr. George Abraham, Dr. John Treanor, and Dr. Bob Helm for their scientific expertise.
My early readers, who provided perspective along the way: Greg Brown, Dick and Connie Brown, Rebecca Kaufman, Jerry and Olivia Kaufman, and John Chaffee.
The web-savvy Alex Cannon, who, along with the team at Sanborn Media Factory, keeps things humming in the online world.
Judd and Kathy Gregg for providing me quiet sanctuary within Green Gables as I wrote the final chapters of this book.
The superb online resources of the Princeton Dante Project, Digital Dante at Columbia University, and the World of Dante.
ILLUSTRATION CREDITS
Grateful acknowledgment is made to the following sources for permission to use the images in this book:
Images on epi.1, 14.1, 15.2, 15.3, 18.6, 18.7, 20.3: Reg.lat.1896. f.101r S. Botticelli, Voragine Infernale, disegno. Author/s: Sandro Botticelli. Title: Voragine Infernale. Volume/Year: 1480–1495. NOTE: Reg. Lat. 1896, pt. A, foglio 21.2. Reproduced by permission of Biblioteca Apostolica Vaticana, with all rights granted.
4, prl.1, prl.2, 6.1, 7.1, 12.1, 16.1, 18.1, 18.3, 19.1, 20.1, 21.1, 32.4, 34.1, 34.2, 34.3, 39.1, 42.1, 42.1, 42.1, 47.1, 49.2, 50.1, 50.2, 51.1, 51.1, 52.1, 52.2, 53.3, 60.2, 62.1, 68.1, 68.2, 68.2, 68.4, 69.1, 69.2, 69.3, 69.4, 71.1, 71.1, 71.2, 71.2, 76.1, 79.1: © Claudio Sforza
prl.3: Godong / © Robert Harding Picture Library Ltd / Alamy
1.1: © Selitbul / istock
2.1: © Wilhelm Lehmbruck Museum, Duisburg, Germany / Bridgeman Images
4.1, 40.1, 70.1, 84.4: copyright © 2014 by Fodor’s Travel, a division of Random House LLC; Used by permission of Fodor’s Travel, a division of Random House LLC. All rights reserved.
4.2: © Kanuman / Shutterstock
7.2: © Ken Welsh / Alamy
7.3: © Galleria degli Uffizi, Florence, Italy / Giraudon / Bridgeman Images
7.4: © Galleria degli Uffizi, Florence, Italy / Bridgeman Images
9.2: © Christian Hartmann / Alamy
10.1: © akg-images / The Image Works
10.2: © De Agostini Picture Library / A. Dagli Orti / Bridgeman Images
10.3: Courtesy of The Harris Tweed Authority, www.harristweed.org
11.1, 37.1, 44.2, 45.1, 45.2, 45.3, 46.1, 48.1, 49.1, 475: © Liesbeth Hogerbrugge-intoFlorence.com. Used with permission by Commune di Firenze.
13.1: © Werner Forman Archive / Bridgeman Images
13.2: © A. Dagli Orti / Art Resource, NY
15.1: © Private Collection / Bridgeman Images
15.5: © RMN-Grand Palais / Art Resource, NY
17.1: Gianni Dagli Orti / The Art Archive at Art Resource, NY
18.2: © World History Archive / Alamy
18.4: © Duomo, Florence, Italy / Bridgeman Images
18.5: © RMN-Grand Palais / Art Resource, NY
18.8: © bpk, Berlin / Kupferstichkabinett, Staatliche Museum / Art Resource, NY
20.2: © The Art Archive at Art Resource, NY
21.2: © Palazzo Pitti, Florence, Italy / Bridgeman Images
21.3: © De Agostini Picture Library / M. Carrieri / Bridgeman Images
22.1: © Peter Probst / Alamy
22.2: © HIP / Art Resource, NY
23.1, 25.2, 25.3, 25.4, 27.1, 27.1, 27.3, 27.4, 29.1, 29.3, 38.1, 53.1, 53.2, 53.4, 56.1: © Richard Klíčník
23.4: © Zoltan Major / Shutterstock
25.1, 29.2: © Galleria degli Uffizi, Florence, Italy / Bridgeman Images
30.1: © AFP / Getty Images
30.2, 32.1, 41.1, 44.1, 59.1, 74.1, 74.2: © Jason Kaufman
32.2, 32.3: © Clive Tully / Alamy
35.1: © Paul Springett 09 / Alamy
35.2, 35.3, 46.2: © Scala / Art Resource
35.4: © AP Images / Courtesy Editech
36.1: © Palazzo Vecchio, Florence, Italy / Bridgeman Images
39.2: © De Agostini Picture Library / Bridgeman Images
41.2: Private Collection / © Bridgeman Images
42.2: © Palazzo Vecchio, Florence, Italy / Alinari / Bridgeman Images
54.1, 54.2L, 55.1, 55.2, 55.3, 81.1: © Ross Brinkerhoff / Fodor’s Travel
57.1: © De Agostini Picture Library / G. Nimatallah / Bridgeman Images
60.1: Courtesy of NetJets
61.1: © Galleria Uffizi, Florence, Italy / Bridgeman Images
61.2T: © Maximus256 / Shutterstock
B: © JPL Designs / Shutterstock
63.1: © Collegiate Church of St. Mary of the Assumption, San Gimignano / De Agostini Picture Library / G. Nimatallah / Bridgeman Images
63.2: © Staatliche Antikensammlung und Glyptothek, Munich, Germany / Bridgeman Images
67.1: © DeA Picture Library / Art Resource, NY
68.5: © Bonhams, London, UK / Bridgeman Images
68.6: © Österreichische Galerie Belvedere / Vienna, Austria / Bridgeman Images
71.3: © Belinda Images / SuperStock
71.4: © one-image photography / Alamy
72.1: James Emmerson / © Robert Harding Picture Library / Alamy
72.2: Photo by Bryce Vick
74.3: M Carrieri / © Universal Images Group / De Agostini / Alamy
74.4: © Norbert Scanella / Alamy
75.1: © Cameraphoto Arte, Venice / Art Resource, NY
84.1: © Eye Ubiquitous / SuperStock
84.2, 87.1, 91.2: © Ergun Ezsoy
84.3: © jps / Shutterstock
85.1: © Ayhan Altun / Moment / Getty Images
85.2: © Prado, Madrid, Spain / Bridgeman Images
85.3: © JL Images / Alamy
85.4: © Hackenberg-Photo-Cologne / Alamy
87.2: © Milosk50 / Shutterstock
88.1: © Mikhail Markovskiy / Shutterstock
88.2: © imageBROKER / Alamy
88.3: © Art Kowalsky / Alamy
89.1: Betty Johnson / © dbimages / Alamy
90.1: Joachim Hiltmann / imag / imagebroker.net / SuperStock
91.1: © Henglein and Steets / Cultura Creative (RF) / Alamy
92.1: © Susana Guzman / Alamy
93.2: © Adam Crowley / Photographer’s Choice / Getty Images
94.1: © Andree Kaiser / Alamy
95.1: © JTB Photo Communications / SuperStock
95.2: © Hercules Milas / Alamy
98.1: © David Mack / Science Source
99.1: © age footstock / SuperStock
99.2: © Dr. Dan Kalman / Katie Vicari / Science Source
101.1: © Laguna Design / Science Source
102.1: © James King-Holmes / Science Source
103.1: © Muratart / Shutterstock
epl.1: © Larry Landolfi / Science Source
ABOUT THE AUTHOR
Dan Brown is the author of The Da Vinci Code, one of the most widely read novels of all time, as well as the international bestsellers The Lost Symbol, Angels & Demons, Deception Point, and Digital Fortress. He lives in New England with his wife.