Actor-Shared Background: Like her actor Diane Kruger, Abigail Chase is said to be a German-American from Saxony (though it's possible Abigail is intended to have been born to US parents based in Germany, rather than German by birth).
All-Star Cast: Of all the names listed in the descriptions, only the most ignorant of movie-goers wouldn't recognize most of them.
An extended prologue, during the story of Charles Carroll, where we actually see him pass on, and John Gates speaking to Andrew Jackson thereafter, who dismisses the story.
The alternate ending, where two kids in the museum inspecting the now-restored Declaration muse about 'an invisible map hidden on the back of the Declaration of Independence' with one of them declaring it to be fake, in front of a bemused Ben Gates, which leads to the unintended Sequel Hook.
Canadian Bruce Greenwood plays the President of the United States.
Life Imitates Art: The scene in Book of Secrets where Ben and Co. are implied to have created fake news of a racially insensitive nature to get the White House staff in charge of the president's birthday celebration to change the location from their first choice to Mt. Vernon can now be seen as this after the events in Charlottesville. The specific details of events, the veracity of news stories and their sources, doesn't matter once the press scents blood in the water.
Staffer 1: Sir, we have to move the party. Some historian claims the Spencer Landmark Hotel was used for Klan meetings in the late 1800s. Chief: Anyone know if this is true? Staffer 2: I've got the Washington Gazette. They want a quote on, "Is the president being insensitive to minority issues?" Staffer 1: Doesn't matter if it's true. Chief: Get me a list of the approved alternates. Now.
There's a quick moment in the first film where one character is seen grabbing a knife. It was never put to use later; the production team was planning on it, but cut that element out (partly for ratings reasons).
The sequel has a scene in which the bad guy stabs Ben's father. It was cut because it crossed the Moral Event Horizon and undermined his Death Equals Redemption moment later. However, there is still a shot in the film in which the actor is acting like he's injured because they didn't re-shoot that scene.
Playing Against Type: Sean Bean's character doesn't die, but he does get arrested and, given the charges, probably put in prison for the rest of his life.