The Mystery Behind "The Last Supper"

This is the famous masterpiece of Leonardo Da Vinci, "The Last Supper". As you see the painting you'll notice that there is something that not presented in the painting. What is it?......This is the Holy GraiL or the Chalice.

According to the Novel "The Da Vinci Code" Dan Brown manipulated the absence of the Holy Grail as Mary Magdalene as bearer of Jesus' Blood. Mary Magdalene is expressed as the Holy Grail wherein in Catholic the Chalice or the grail is the container of wine(symbolizes as Jesus' Blood).

Eventhough Brown's Novel is a fiction, it is a mystery that why in the painting the last supper, there is no such grail or chalice?

Others conducted studies about this painting, watch this video


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Superimposing the painting of the Last Supper creates a whole Holy Grail between his hands.
another one
*The women on the right of Jesus was appeared carrying an infant
*Strange man standing in far right of Jesus

Is it just a chance?

or........

Leonardo Da Vinci wants to say something?