The composition is based on a square root of five rectangle. 39 multiplied by 2.236 equals 84.968. This is a bold-faced square root of five rectangle. If you don’t believe me, please do the math and you’ll see. By and large the square root of five rectangle is the most unpleasant square root rectangle of the dynamic proportions, but still, embodies the totality and complexity of painting.

The work is presumed to have been commenced around 1495 and was commissioned as part of a scheme 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 disciples, as it is told in the Gospel of John, 13:21. Leonardo has depicted the consternation that occurred among the Twelve Disciples when Jesus announced that one of them would betray him.

Due to the methods used, and a variety of environmental factors, very little of the original painting remains today, despite numerous restoration attempts, the last being completed in 1999.