Equilibrium, 2002.  
Starring Christian Bale and Taye Diggs
 

In the scenes below, you can clearly see a painting behind Christian Bale's character, John Preston, and another behind Angus Mcfadyen's character, Dupont.  When I first saw the paintings, I knew immediately who the artist was.  But after some investigation, I found an interesting revelation about each painting.

 

Consequences of War, also known as Horrors of War,^[1] was executed between 1638-1639 by Peter Paul Rubens in oil paint on canvas. It was painted for Ferdinando II de' Medici. Although commissioned by an Italian, art historians characterize both the work and the artist as Flemish Baroque. It serves as a commentary on a European continent ravaged by the Thirty Years' War, and the artist employed numerous symbols, both contemporary and ancient, to deplore the state of the continent.  (Wikipedia)

 As you can see above, the painting behind Bale is very similar to the original by Peter Paul Rubens.  The difference being the figure added on the lower left hand corner and the other figure altered on the lower right hand corner..otherwise it is almost identical.

Title: The allegory on the blessings of Peace Artist: Peter Paul Rubens  Start Date: 1629  Completion Date:1630  Style: Baroque  Genre: allegorical painting Technique: oil  Material: canvas Dimensions: 204 x 298 cm  Gallery: National Gallery, London, UK

 The scene above depicts another reproduction of Peter Paul Ruben's painting The Allegory on the Blessings of Peace.  As you can see, the reproduction in the movie is almost a mirror image depicting the two female characters facing opposite directions from the original. Some of the other characters were kept  but some where removed to accomodate the new composition. Yet it is undeniable that it is a reproduction of a Rubens masterpiece.

Movie: Wall Street. Poster of the movie.

 “THIS painting here, I bought it 10 years ago for $60,000. I could sell it today for $600,000. The illusion has become real, and the more real it becomes, the more desperately they want it.” -Gordon Gekko

 

Artist: Joan Miro

Title: "Paysage"

Year: 1974, oil on canvas

Medium: Oil on canvas

Size: 84 5/8 x 68 1/8 in.

The painting in the background looks like a Picasso.  UNCONFIRMED.

 The painting above is similar to the ones below painted by Pablo Picasso

Pablo Picasso, Buste, 1970. Oil on canvas, 39 ½" x 32" inches

Pablo Picasso, Dora Maar au Chat, 1941. Oil on canvas 50.5" x 37.5"

The paintings shown here may be Jean Dubuffet. UNCONFIRMED.

 Some examples of Jean Dubuffet's work

Jean Dubuffet, Les Vicissitudes, 1977. Acrylic paint on paper and canvas. 82.5" x 133"

Close up shot of Robert Birmelin painting.

The Twenty Dollar Bill

Artist: Rober Birmelin, Artist's website

Title: "The Twenty Dollar Bill"

Year: 1985

Medium: Acrylic on canvas

Size: 72" x 108"

Looks like Jim Dine prints on the walls.

'Study for This Sovereign Life', oil painting with sand by Jim Dine, 1985

LEFT: Keith Haring Wooden mask of Medusa (UNCONFIRMED) RIGHT: White head on blue background, Unknown

This is a drawing by Keith Haring similar to the wall piece shown in the movie still above.

Keith Haring, Head of Medusa

This looks like a Julian Schnabel plate painting. UNCONFIRMED.

 Here is an example of a Julian Schnabel work in the same style:

Julian Schnabel (1951 geb.) Untitled, 1983, oil, ceramic plates, bondo on wood, 2-part, 275 x 245 x 25 cm,

This looks like the work of Carlo Maria Mariani (UNCONFIRMED)

Sample of Carlo Maria Mariani's work:

The City 7, 2002,  Oil on Canvas 70 inches x 70 inches

Anthony White has an awesome website dedicated only to Wall St. the movie and it's where I obtained most of the movie stills.  Make sure you check out his site.
http://www.anthonywhite.net/wall_street_art.htm