The Evangelist, Saint John the Beloved, is seated next to Christ, as the youngest of the disciples, he is depicted as beardless. He receives in his left hand a piece of the Body of Christ.
Judas Iscariot the Betrayer without halo is depicted dipping into the dish (Matthew 26:20-25).
Protaton Karyes
Lavra
Lavra, Trapeza
Vatopedi
Vatopedi
Chilandariou
Dionysiou
Docheiariou
Filotheou
Xenophontos
Herman Voogd
Athos - Agios Oros 
Very Nice collection of paintings.
I Thank you so much for this excellent photo album. I am in the process of designing an icon of the Mystical supper and this is very helpful to me. In CX, Filea
“And as they were eating, Jesus took bread, and blessed, and brake it; and he gave to the disciples, and said, ‘Take, eat; this is my body.’ And he took a cup, and gave thanks, and gave to them, saying, ‘Drink ye all of it; for this is my blood of the covenant, which is poured out for many unto remission of sins.'” (Mat 26)