A broad
art form that can include combinations of other
media. Installation
art is generally presented as an
environment in which the
viewer stands or sits to
experience the piece. The
distinction between an installation and a
series of related artworks in the same space is a little
blurry, but it usually isn't necessary to get too strict about such categorizations.
While the critical notion of the installation is unique to the late 20th century, such classical works as Bernini's Ecstasy of St. Teresa and Michaelangelo's Sistine Chapel could certainly be classified as installations.