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
Conservation-restoration of Leonardo da Vinci's The Last Supper by Leonardo da Vinci, depict the coats of arms of Leonardo's patron, Ludovico Sforza and his sons, Maximilian and Francesco. The 20th century brought advancements in scientific technologies that were used in the restoration and conservation of "The Last Supper". The first person to conduct an analysis of the painting’s chemical components was Luigi Cavenaghi, in 1908. From this analysis, Cavenaghi concluded that the painting was completed in tempera paint, on two layers of plaster. In 1924, the Italian painter Oreste Silvestri led the task of cleaning Leonardo's work, as well as applying new plaster to the edges of the