"Last Supper"
Author of the image is Leonardo Da Vinci.
The Picture
The painting came into existence to order of prince of Ludovico Sforzy Milan. He will give to Vinci painted the mural for 3 years.
Hidden signs
According to the Italian musician and the computer specialist of Giovanni Maria of Stilts, in the insult "hidden" there is a musical notation of the brief requiem mass.