CHICAGO — This summer marks 20 years since filmmaker Christopher Nolan altered superhero culture with his first installment of the Dark Knight trilogy, “Batman Begins.”

Batman may be a fictional DC Comics character, but for many, he’s a significant staple in their movie-going lives. The realism of the caped crusader especially appeals to Chicagoans because two of the director’s three Batman movies were filmed here.

“Batman Begins,” the trilogy’s first movie, was released in 2005, starring Christian Bale as Bruce Wayne, and was filmed in Iceland, England and Chicago in 2004.

The plan was to film in Chicago for a few days, but Nolan took such a liking to the city — a place he had spent time in his youth — that he asked the studio for additional filming time, according to a 2009 story in C

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