Installation art can be either temporary or permanent. Installation artworks have been constructed in exhibition spaces such as museums and galleries, as well as public and private spaces. The genre incorporates a broad range of everyday and natural materials, which are often chosen for their “evocative” qualities, as well asnew media such as video, sound, performance, immersive virtual reality and the internet. Many installations are site-specific in that they are designed to exist only in the space for which they were created. A number of institutions focusing on Installation art were created from the 1980s onwards, suggesting the need for Installation to be seen as a separate discipline. These included the Mattress Factory, Pittsburgh, the Museum of Installation in London, and the Fairy Doors of Ann Arbor, MI, among others.
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. (wikipedia.org)