Dark Knight's kind of town: Gotham City

updated 6:36 p.m. ET July 20, 2008

CHICAGO - Christian Bale's Batman is perched atop a skyscraper, looking over a dark and foggy skyline pierced by glittering lights, preparing for a dive to the gritty streets below.

But when he alights, he won't find the gargoyle-infested, bricks-and-mortar city that Washington Irving first coined "Gotham." He won't battle the Joker on wet cobblestones, or loom in the shadows of a dominant spire that evokes the Empire State building.

Heath Ledger isn't the only scene-stealer in "The Dark Knight." In the newest incarnation of the movie franchise, the mythical Gotham City — long assumed to be an allegorical Big Apple — is unmistakably based on Chicago.

Not that a move to the Midwest is such a stretch. Neal Adams, who has illustrated Batman for DC Comics since the 1970s, says he's always thought of Chicago, with its 1940s mobster history and miles of dark alleys, as the basis for Gotham City.

"Chicago has had a reputation for a certain kind of criminality," says Adams, who lives in New York. "Batman is in this kind of corrupt city and trying to turn it back into a better place. One of the things about Chicago is Chicago has alleys (which are virtually nonexistent in New York). Back alleys, that's where Batman fights all the bad guys."

But Chicago's back-of-the-building ethos isn't the only reason the "Dark Knight" filmmakers chose to focus on the Second City's style.

"I think the architecture of the city is really brilliant, fantastic," said director Christopher Nolan, as he strolled the red carpet while heading into Chicago's premiere of the film last week. "That gave us an incredible amount of variety that's used as the background for the film."

Nolan, who once lived in Chicago, spent three weeks here shooting the previous film, "Batman Begins." For "The Dark Knight," he expanded that time to three months.

Look for the landmarks
And by no means did his cameras shy from the buildings and landmarks, elevated trains and underground streets that easily identify the Windy City: He flipped a semi-truck on LaSalle Street. He blew up abandoned buildings on the city's west side. Cameras pan above the Chicago Board of Trade, the Chicago River, the Magnificent Mile.

Chicago's modern feel lent itself well to Gotham City, says James McAllister, the key location manager for "The Dark Knight."

"Everywhere you look is a good angle," McAllister says. "Visually it's that look like you would see in the comic books. You can see all the way down the street and you can turn a corner and you're under the El or in an alley that's dark."

That's not to say the latest filmmakers abandoned New York all together.

In Nolan's "Batman Begins," Gotham City's layout is more similar to New York's, McAllister says. "There's all these different boroughs, with rivers to interconnect. I think it's hard to get away from that, because Gotham is based on New York," he said.

And in a wide shot from the early part of Nolan's first "Batman" movie, Gotham appears more like a coastal harbor than a lakeside city, its every square inch bristling with tall buildings, much like in New York.

Gotham is "New York from 14th Street down, the older buildings, more brick-and-mortar as opposed to steel-and-glass," says Paul Levitz, the president and publisher of DC Comics, which has held onto the Batman franchise since the hero's debut in the 1940s.

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