Woodstock Music and Art Fair, commonly referred to as Woodstock, was a music festival held during August 15–18, 1969, on Max Yasgur's dairy farm in Bethel, New York, United States, southwest of the town of Woodstock. Billed as "an Aquarian Exposition: 3 Days of Peace & Music" and alternatively referred to as the Woodstock Rock Festival, it attracted an audience of more than 400,000 attendees. Thirty-two acts performed outdoors despite sporadic rain. It was one of the largest music festivals held in history. The festival has become widely regarded as a pivotal moment in popular music history as well as a defining event for the counterculture generation. The event's significance was reinforced by a 1970 documentary film, an accompanying soundtrack album, and a song written by Joni Mitchell that became a major hit for both Crosby, Stills, Nash & Young and Matthews Southern Comfort. Music events bearing the Woodstock name were planned for anniversaries, which included the tenth, twentieth, twenty-fifth, thirtieth, fortieth, and fiftieth. In 2004, Rolling Stone magazine listed it as number 19 of the 50 Moments That Changed the History of Rock and Roll. In 2017, the festival site became listed on the National Register of Historic Places. Planning and preparation Woodstock was initiated through the efforts of Michael Lang, Artie Kornfeld, Joel Rosenman, and John P. Roberts. Roberts and Rosenman financed the project. Lang had some experience as a promoter, having co-organized the Miami Pop Festival on the East Coast the previous year, where an estimated 25,000 people attended the two-day event. Early in 1969, Roberts and Rosenman were New York City entrepreneurs, in the process of building Mediasound, a recording studio complex in Manhattan. Lang and Kornfeld's lawyer, Miles Lourie, who had done legal work on the Mediasound project, suggested that they contact Roberts and Rosenman about financing a similar, but much smaller, studio Kornfeld and Lang hoped to build in Woodstock, New York. Unpersuaded by this Studio-in-the-Woods proposal, Roberts and Rosenman counter-proposed a concert featuring the kind of artists known to frequent the Woodstock area (such as Bob Dylan and The Band). Kornfeld and Lang agreed to the new plan, and Woodstock Ventures was formed in January 1969. The company offices were located in an oddly decorated floor of 47 West 57th Street in Manhattan. Burt Cohen, and his design group, Curtain Call Productions, oversaw the psychedelic transformation of the office. From the start, there