I'll bet there are a lot of artists that nobody hears about who just make more money than anybody. The people that do all the sculptures and paintings for big building construction. We never hear about them, but they make more money than anybody.
Andy Warhol, Mark Francis, Mattjis Visser, Museum Kunst Palast (Düsseldorf, Germany), Kunstmuseum Liechtenstein (2004). “Andy Warhol: the late work”, Prestel Publishing
