The present essay represents for the author an occasion to retrace his philosophy of art, referring in particular to the themes related to contemporary art. Starting from the historical importance which the photographic experiments of Eadweard Muybridge had for painting (and not only), Arthur Danto once again comes to wonder about the famous Brillo Box of Andy Warhol, demonstrating how, in the face of different avant-guard artistic movements of the early Sixties (specially in the usa), it is indeed philosophy that questions itself, reconsidering its own concept of the eternity of art and the way in which works of art must be interpreted.