the Proun Room at the Berlin Railway Station in 1923, designed by the Russian artist El Lissitzky (1890-1941), possibly the earliest ever installation; the Spatial Environments of the painter and sculptor Lucio Fontana (1899-1968) and his White Manifesto outlining his theories of Spatialism; the "4-33" silent musical composition composed by John Milton Cage Jr (1912–1992). In addition, the assemblages and writings of the American avant-garde artist Allan Kaprow (b.1927) - notably his 1966 book 'Assemblage, Environments and Happenings' - were also highly influential on the development of the Installation genre.