For 10 points, name this novel in which the D?rer image of a scene from the Book of Revelation symbolizes the horror of World War I, the magnum opus of Vicente Blasco Ib?ez.
A solid gold bathtub is the centerpiece of a castle in this novel, which is filled with wealth gained from one character's auctioneering.  Near the end of this novel, that character has his furnishings defecated on by the company of the son of Karl Hartrott. The Senator Lacour, whose son is engaged to the protagonist's daughter Chichi, enables him to witness the brutality of the German invaders near Paris. That protagonist's skill at the tango enables him to have an affair with Marguerite Laurier, upsetting his father Julio Madariaga, who fled his home country for Argentina after that nation's participation in the Franco-Prussian war. For 10 points, name this novel in which the D?rer image of a scene from the Book of Revelation symbolizes the horror of World War I, the magnum opus of Vicente Blasco Ib?ez.
A solid gold bathtub is the centerpiece of a castle in this novel, which is filled with wealth gained from one character's auctioneering.  
The Four Horsemen of the Apocalypse [or Los Cuatro jinetes del Apocalipsis]