Nice little quote from here from an article (http://www.guardian.co.uk/film/2000/feb/19/1) in a UK newspaper:"Frayling believes Leone's visceral grasp of imagery, the way he put together Ennio Morricone's music, sun and shadow, made him an artist of collages - the preferred surrealist technique. (He once saw a surrealist painting by De Chirico that Leone bought the year he made The Good, the Bad and the Ugly: high-contrast light on a colonnade and on a cow-catchered western locomotive - the whole movie on a small canvas.) That made Leone, in Baudrillard's description, the first postmodernist director, "the first to understand the hall of mirrors within the contemporary culture of quotations"."
check out the Guggenheim it has some Hopper too. An while your delving into art check out the "Ash Can" school artists.
It would be awesome if Frayling himself organised a documentary where he tours Leone's home.
Okay, looks like I've finally found out which de Chrico painting Leone owned: it was Ariadne (1913), currently in the Metrolopolitan Museum of Art in New York http://www.metmuseum.org/toah/works-of-art/1996.403.10Frayling says so at 25:21 of this vid http://www.watershed.co.uk/dshed/filmic-christopher-frayling-few-guitars-moreFrayling says "Leone referred to GBU as 'de Cjrico rides the range' "
Frayling can be wrong about certain things, I remember in the GBU commentary where he mentions LVC's finger during the final showdown being something done by the make up artists when in actual fact LVC had an accident where the tip of his right finger was cut off.