Photo Scala, Florence.

The British Museum, London.

The British Museum, London.

Photo Scala, Florence. Courtesy of the Ministero Beni e Att. Culturali.

Photo Scala, Florence.

Photo Scala, Florence. Courtesy of the Ministero Beni e Att. Culturali.

Photo Scala, Florence.

Photo © Peter Horree/Alamy.

Photo Scala, Florence.

Photo akg-images/Rabatti-Domingie.

Photo The Art Archive.

Photo akg-images/Rabatti-Domingie.

Photo akg-images/Erich Lessing.

Photo akg-images.

Photo The Bridgeman Art Library.

Photo akg-images/Erich Lessing.

Photo akg-images/Erich Lessing.

Photo akg-images/Rabatti-Domingie.

Photo akg-images/Rabatti-Domingie.

Photo Scala, Florence. Courtesy of the Ministero Beni e Att. Culturali.