"Four Hundred Thirty-Three," often abbreviated as 4'33", is a musical composition by American composer John Cage. Premiered in 1952, the piece is notable for its unique structure, consisting of three movements during which the performer does not play their instrument. Instead, the focus is on the ambient sounds present in the performance space, encouraging listeners to engage with the environment. The work challenges traditional notions of music and silence, prompting discussions about the nature of sound and listening. 4'33" has been influential in the development of avant-garde music and is often associated with the Fluxus movement, which sought to blur the boundaries between art forms.