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
Lucan portrait of Leonardo da Vinci discovery by Nicola Barbatelli, the painting was subjected to an initial examination by Alessandro Vezzosi, director of the Museo Ideale Leonardo da Vinci at Vinci, who confirmed that the painting appeared to be from the Renaissance period. Vezzosi was reported, in February 2009, as investigating whether the painting was the work of a minor 16th-century artist Cristofano dell'Altissimo. Altissimo executed numerous portraits of famous men for Cosimo I de' Medici, Grand Duke of Tuscany, some of them after the Giovio Series, including a profile of Leonardo based on the red chalk profile drawing in the Royal Collection attributed to Leonardo's