Assemblage is an art term used to describe many different art forms, and movements. The most prominent of these is collage, and its close cousin decollage. Collage as a technique was used by many different art groups since the beginning of the modern age. Including cubism, color field, constructivism, and various postmodern disciplines. An assemblage can be made of paper, fabric, photos, or in the case of much of Robert Rauschenberg's work, even 3-dimensional objects such as the boxes of Joseph Cornell. Collage (From the French, coller, to stick or glue) is the assemblage of different forms creating a new whole. ... Décollage, in art, is the opposite of collage; instead of an image being built up of all or parts of existing images, it is created by cutting, tearing away or otherwise removing, pieces of an original image. ... Woman with a guitar by Georges Braque, 1913 Cubist house in Prague Cubism was an avant-garde art movement that revolutionized European painting and sculpture in the early 20th century. ... Color Field is an art movement characterized by canvases being covered entirely by large fields of solid color. ... In education, constructivism is a learning theory which holds that knowledge is not transmitted unchanged from teacher to student, but instead that learning is an active process of recreating knowledge. ... Robert Rauschenberg is a painter, sculptor, and graphic artist known for helping to redefine American art in the 1950s and 60s, providing an alternative to the then-dominant aesthetic of Abstract Expressionism. ... Joseph Cornell, (Born in Nyack, New York December 24, 1903 – died December 29, 1972) was an American sculptor, one of the pioneers and most celebrated exponents of assemblage. ...