Conservation-restoration of Leonardo da Vinci's The Last Supper until 1498. The scene is understood to depict the Bible verse John 13:22, showing the reactions of the Twelve Disciples, at the Last Supper, in the moments following Jesus’s announcement that one among them will betray him. When he received the commission for "The Last Supper", Leonardo da Vinci had never worked on a piece of this great a size, fifteen feet high by almost twenty-nine feet wide. He also had very limited experience working in the technique known as fresco, mixing pigment into wet plaster to create a permanent bond. Traditionally, fresco painters put down many successive layers of
Science and inventions of Leonardo da Vinci would light it as it lights us. Claims are sometimes made that Leonardo da Vinci was an alchemist. He was trained in the workshop of Verrocchio, who according to Vasari, was an able alchemist. Leonardo was a chemist in so much as that he experimented with different media for suspending paint pigment. In the painting of murals, his experiments resulted in notorious failures with the "Last Supper" deteriorating within a century, and the "Battle of Anghiari" running off the wall. In Leonardo's many pages of notes about artistic processes, there are some that pertain to the use of silver and