John Cage’s Northwestern University Archive 

Source: Chicago Reader.

Wesleyan University holds documents related to most of Cage’s books, the New York Public Library holds most of Cage’s music manuscripts, and the University of California, Santa Cruz, holds Cage’s materials related to mycology (the study of fungi). But the collection at Northwestern is the largest single concentration of Cage materials anywhere in the world—it not only surveys modern musical composition during the 1960s but also humanizes a composer who continues to divide scholars with his challenges to the definition of music.