Possible Clues:

• Painting beam in doorway
• Painting by artist unknown installed in entrance
• Picture or description of royal prat
• Picture shaft of light entering doorway
• Beam in doorway needs painting
• Depiction of light coming in the doorway
• Description of beam incorporated in doorway
• Representation of role of sovereign if you swap one for nothing
• Half-cut janitor to put pictures up -- like this?
• Beam in doorway needed painting