In 2006, Nolan announced that the follow-up to "Batman Begins" would be called "The Dark Knight". Approaching the sequel, Nolan wanted to expand on the noirish quality of the first film by broadening the canvas and taking on "the dynamic of a story of the city, a large crime story... where you're looking at the police, the justice system, the vigilante, the poor people, the rich people, the criminals". Released in July 2008 to great critical acclaim, "The Dark Knight" has been cited as one of the best films of the 2000s and one of the best superhero films ever made. Manohla Dargis of "The New York Times" found the film to be of higher artistic merit than many Hollywood blockbusters: "Pitched at the divide between art and industry, poetry and entertainment, it goes darker and deeper than any Hollywood movie of its comic-book kind." Ebert expressed a similar point of view, describing it as a "haunted film that leaps beyond its origins and becomes an engrossing tragedy." "The Dark Knight" set many box-office records during its theatrical run, earning over $1billion worldwide. At the 81st Academy Awards, the film was nominated for eight Oscars, winning two: the Academy Award for Best Sound Editing and a posthumous Academy Award for Best Supporting Actor for Heath Ledger. Nolan received many awards and nominations for his work on the film. It was designated as "culturally, historically or aesthetically significant" by the Library of Congress in 2020 and selected for preservation in the National Film Registry.