The Last Supper is a late 15th-century mural painting by Italian artist Leonardo da Vinci housed by the refectory of the Convent of Santa Maria delle Grazie in Milan, Italy. It is one of the western world's most recognizable paintings.
The work is presumed to have been started around 1495–96 and was commissioned as part of a plan of renovations to the church and its convent buildings by Leonardo's patron Ludovico Sforza, Duke of Milan. The painting represents the scene of the Last Supper of Jesus with his apostles, 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.
For this work, Leonardo sought a greater detail and luminosity than could be achieved with traditional fresco. He painted The Last Supper on a dry wall rather than on wet plaster, so it is not a true fresco. Because a fresco cannot be modified as the artist works, Leonardo instead chose to seal the stone wall with a double layer of dried plaster. Then, borrowing from panel painting, he added an undercoat of white lead to enhance the brightness of the oil and tempera that was applied on top. This was a method that had been described previously, by Cennino Cennini in the 14th century. However, Cennini had recommended the use of secco for the final touches alone. These techniques were important for Leonardo's desire to work slowly on the painting, giving him sufficient time to develop the gradual shading or chiaroscuro that was essential in his style.
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.