In Milan, I was captivated by this painting. Look at the luminescence behind the figure of Christ created by another genius.
Leonardo da Vinci (1452-1519), the Florentine master's masterwork, The Last Supper, one of the world's best loved religious paintings, is located in the inconspicuous church of Santa Maria delle Grazie, Milan. Leonardo, always the inventor, tried using new materials for The Last Supper. Instead of using egg tempera on wet plaster (the preferred method of fresco painting, and one which had worked successfully for centuries), he thought he'd give using dry plaster a whirl. His experiment resulted in a more varied palette, which was Leonardo's intent. What he hadn't taken into account (because, who knew?) was that this method wasn't at all durable. The painted plaster began to flake off the wall almost immediately, and people have been attempting to restore it ever since.
LEONARDO DA VINCI "Obstacles cannot crush me. Every obstacle yields to stern resolve. He who is fixed to a star does not change his mind."