Pink Floyd‘s Dark Side of the Moon and Simon and Garfunkel’s The Sound of Silence are among 25 new additions to the Library of Congress. Recordings are chosen for the National Recording Registry based on their cultural, artistic and historic importance, says The Associated Press.

Dark Side of the Moon, which celebrates its 40th anniversary this weekend, received the most public nominations for the registry.  The library called it a “brilliant, innovative production in service of the music.”

Also being added are the Saturday Night Fever soundtrack, which featured songs by the Bee Gees, Chubby Checker’s The Twist, the original cast recording of South Pacific, and recordings by Will Rogers, Jimmi Davis, President Dwight D. Eisenhower, and classical pianist Van Cliburn.