"The Faceless Businessman in a Bowler Hat"
"Everything but the briefcase."
The painting referred to by Rene Russo's character as "The Faceless Businessman in a Bowler Hat" is actually "The Son of Man" by René Magritte.
"I just like my Haystacks Bobby."
The painting that Thomas Crown (Pierce Brosnan) calls "Haystacks" and sits and stares at while he eats his breakfast is actually "Noon: Rest from Work (after Millet)" by Vincent van Gogh.