A painting in a museum probably hears more foolish remarks than anything else in the world .

[Ce qui entend le plus de bêtises dans le monde est peut-être un tableau de musée.]

The Brothers Goncourt - Edmond (1822-96) & Jules (1830-70), French writers [a.k.a. J.E. de Goncourt]

Idées et sensations (1866)
    (Source)

Often mis-cited to just Edmond. Alternate translations:

• "A painting in a museum hears more ridiculous opinions than anything else in the world."
• "What hears the most stupid remarks in the world is perhaps a painting in a museum." [Source]
• "Perhaps what hears the most nonsense in the world is a museum painting." [Source]