Related Clues:

• 'The Last Supper,' e.g.
• Subway artwork
• Piece of street art
• Piece of cave art
• 'The Last Supper,' for one
• Big picture
• Gallery display
• Bit of street art
• Giotto work
• Diego Rivera wall work
• Big picture, really
• "The Last Judgment," e.g.
• Big painting
• Many a commissioned artwork
• Wall art