Unless otherwise listed, all illustrations are courtesy of Wikimedia Commons.
1: © The Parthenon, Nashville, Tennessee
2: © Musei di Villa Torlonia, Rome, Italy
3: © FALKENSTEINFOTO/Alamy Stock Photo
4: © Azoor Photo/Alamy Stock Photo
5: © Paolo Romit/Alamy Stock Photo
6: © Paul Fearn/Alamy Stock Photo
7: © DEA Picture Library/Contributor, Getty Images
8: © Ivan Vdovin/Alamy Stock Photo
9: © National Library of the Netherlands
10: © Godong/Contributor, Getty Images
11: © Mondadori Portfolio/Contributor, Getty Images
12: © Art Collection 2/Alamy Stock Photo