The Last Supper: 7 Details Most People Miss in Leonardo's Masterpiece

A wall in Milan, not a canvas

Leonardo painted the Last Supper between about 1495 and 1498 on the north wall of the refectory of Santa Maria delle Grazie, the Dominican convent in Milan.¹ The commission came from Ludovico Sforza, the ruler of Milan and Leonardo's patron at the time.² The mural measures 460 × 880 cm.¹

Since 1980 the church, the convent and the Last Supper have been listed together as a UNESCO World Heritage Site.¹

The moment Leonardo chose

The scene follows the Gospel account in which Jesus tells the apostles that one of them will betray him.² Leonardo arranges the twelve in four groups of three and builds the room around a single vanishing point at Jesus's right temple, so that the lines of the architecture lead the eye to his face.² Instead of a painted halo, his head is framed by the bright window behind him.³

Seven details worth a second look

1. The space beside Jesus

To Jesus's right, the young, beardless apostle traditionally identified as John leans away towards Peter, leaving a V-shaped gap between the two figures. The gap belongs to the rhythm of the composition: groups of figures separated by pauses.

2. A hand holding a knife

Behind Judas, a hand grips a knife. It belongs to Peter, whose arm is twisted back as he leans in to speak to John.⁴ Many writers connect the knife with the Gospel episode in which Peter later cuts off the ear of the high priest's servant (John 18:10).⁴

3. Salt near Judas

Near Judas's elbow lies an overturned salt cellar. In the damaged original it is hard to make out; early copies of the mural show it more clearly.⁴

4. A melody in the bread?

In 2007 the Italian musician Giovanni Maria Pala proposed that the bread rolls on the table and the hands of the figures, read as notes on a stave from right to left, form a short melody of about 40 seconds.⁵

5. The door that took Jesus's feet

In 1652 a doorway was cut into the wall below the centre of the painting, removing Jesus's feet and loosening the paint and plaster around it.² The doorway has since been bricked up, but the loss remains.⁶

6. The wall that survived the bombing

In August 1943 bombing destroyed the roof vault of the refectory and the decoration of its eastern wall.³ The wall with the Last Supper stayed standing, but the painting was exposed to the weather for several months before the hall was rebuilt.²

7. An experiment that began to fail almost at once

Leonardo did not paint in true fresco, in which pigment binds with wet plaster. He chose to paint on the dry wall, which let him work slowly and make changes.¹ The paint never bonded permanently and began to flake within a few years.² Steam from the kitchen, candle soot, damp, the use of the hall as a stable by Napoleon's troops and a flood in the early 19th century added to the damage.²

The most recent restoration, led by Pinin Brambilla Barcilon, lasted more than twenty years and was completed in 1999.⁷ It removed earlier repainting, grime and varnish, and it is still debated, because much of the original paint had already been lost.²

Seeing it today

The refectory is now the Museo del Cenacolo Vinciano. For conservation reasons, visits last 15 minutes for groups of up to 40 people, and booking is compulsory (as stated by the museum in November 2026).¹ On the opposite wall is Giovanni Donato Montorfano's Crucifixion, dated 1495.³

Play video: The Last Supper Is Hiding 7 Secrets Nobody NoticedPlaying the video loads it from YouTube.

Our video essay looks at the same seven details on the wall itself.