This 25-foot-wide painting is a copy of Leonardo da Vinci’s Last Supper painted by Giampietrino and possibly Giovanni Antonio Boltraffio – both pupils of Leonardo da Vinci.

It’s believed to be the most accurate record of the original and has been used to help with its conservation.

This version is oil paint on canvas, whereas Leonardo’s version was painted in tempera and oil on a dry wall – an unusual use of materials – so has flaked and deteriorated badly.

It probably didn’t help that Napoleon used the original Last Supper’s room as a stable during his invasion of Milan.

In this copy you can see details now not visible in the original, such as this overturned salt-cellar next to Judas’s right arm.

Spilled salt was commonly considered a bad omen in 16th-century western Europe.

You can also see Jesus’ feet in this painting, which were lost in the original when a door was built into the wall that the work is painted on.

Details

• Title: The Last Supper

• Creator: Attributed to Giampietrino and Giovanni Antonio Boltraffio

• Date Created: c.1515-20

• Type: Painting

• Medium: Oil on canvas

• Physical dimensions: h3020 x w7850 mm  (9.91 feet x 25.75 feet)