The article presents information on art. People are in the process, these days, of reassimilating what had once been known as the artistic "machine." In the 19th century everyone knew that the "machine" was a gigantic painting in heroic style, generally of academic or Salon origin, a history picture, official, sometimes a mural and always a rhetorical demonstration of the artist's engagement with ideas and the exposition of his skill. The word, of course, is derogatory: it seizes upon the mechanism and pretentiousness which were the features of many, but by no means all, the works of art which have since then aspired to grandeur. Twentieth-century artists have generally been unable to work on this scale without some fundamental irony or displacement of energy.