Yeah, that painting was in the first Batman movie, the one with Michael Keaton and Jack Nicholson.
There's a scene where the Joker is destroying all the works of art in a museum; smashing statues, defacing portraits, and just as one of his henchmen is about to spray-paint over "Pope Innocent" the Joker stops him, saying "Not this one, I like it."
Ha Ha
Anyway, after 20 years, I finally know what the name of that painting is.