From today's Variety, stumbled on this one, called National Treasure
starring Nicholas Cage and Sean Bean. It's supposed release date is Nov 24,
2004

From Yahoo:

Modern treasure hunters, led by an archaeologist, Ben Franklin Gates (Cage),
who is the eighth descendant in a family all searching for the same thing: a
massive war chest treasure reportedly hidden by George Washington, Thomas
Jefferson, and Benjamin Franklin as funds for the Revolutionary War, using a
secret code found in the Constitution (and a map that might have been drawn
on the back of the Declaration of Independence) to find its location. (Diane
Kruger plays a museum curator at the Smithsonian who is central to the plot;
Justin Bartha plays Cage's best friend; Sean Bean plays a rich British
adventurer who also wants the treasure)

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