Related Clues:

• Bill
• 'The Last Supper,' e.g.
• Notice
• Subway artwork
• Piece of street art
• Cinephile's collectible
• Piece of cave art
• Entablature part
• See 56-Across
• Ornamental band
• Diego Rivera work
• 'The Last Supper,' for one
• Big picture
• Wall hanging
• Gallery display