Related Clues:

• 'The Last Supper,' e.g.
• 'The Last Supper,' for one
• Michelangelo work
• Sistine Chapel painting, e.g.
• Wall art
• Art on plaster
• Plaster art
• Wall painting
• Painting on moist plaster
• Sistine Chapel artwork
• Work on a wall
• Painting on plaster
• Watercolor on wet plaster
• Painting technique
• Recombined 'forces'?