Photo credits pages 2 and 3, clockwise from top left: © Massimo Pizzotti / ​ age fotostock and Hagia Sophia; © Angelo Cavalli / ​ age fotostock; © Alain Caste / ​ age fotostock; © 2010 SuperStock; Engravings by Doré
‏: counterclockwise from top right ‏; Massimo Pizzotti / age fotostock and Hagia Sophia © ‏; Angelo Cavalli / age fotostock © ‏; Alain Caste / age fotostock © 2010 SuperStock; Engravings by Doré ©