Installation art
Installation art came to prominence in the 1970s but its roots can be identified in earlier artists such as Marcel Duchamp and his use of the readymade and Kurt Schwitters' "Merz" art objects, rather than more traditional craft based sculpture. The "intention" of the artist is paramount in much later installation art whose roots lie in the conceptual art of the 1960s. This again is a departure from traditional sculpture which places its focus on form. Early non-Western installation art includes events staged by the Gutai group in Japan starting in 1954, which influenced American installation pioneers like Allan Kaprow.