The Last Supper (Leonardo da Vinci) as it is told in the Gospel of John, 13:21. Leonardo has depicted the consternation that occurred among the Twelve Apostles when Jesus announced that one of them would betray him. Due to the methods used, a variety of environmental factors, and intentional damage, very little of the original painting remains today despite numerous restoration attempts, the last being completed in 1999. "The Last Supper" measures and covers an end wall of the dining hall at the monastery of Santa Maria delle Grazie in Milan, Italy. The theme was a traditional one for refectories, although the room was not a
Conservation-restoration of Leonardo da Vinci's The Last Supper plaster before and during the painting process. This method requires fresco painters to work quickly and with a pre-set plan. However, this is not how Leonardo worked, and because of that, he chose a new technique of putting a mixture of oil and tempera paints onto a dry wall. According to Ross King, “In essence, [Leonardo] took tempera paints and mixed emulsifying oils into them.” This allowed Leonardo to include richer colors, finer details, and at a slower work pace. Leonardo da Vinci first coated the wall with a coat of plaster. He then added a thin layer of calcium