Installation art is a style of visual art that uses three-dimensional objects. These artworks are usually meant to change the perception of a space (the way a space is seen). Installation artworks can be permanent or temporary and are shown in museums, galleries or in public spaces.
Some of the earliest installation artworks were Marcel Duchamp's readymade objects. However, the real development started in the 1970s. Today, with the improvement of technology, artists use and mix new medias and may involve sensors too in order to make the visitors interact with the installations.
Gallery
Marcel Duchamp, Fountain 1917. Photograph by Alfred Stieglitz
Irrationnal Geometrics by Pascal Dombis, 2008
La Signorina Felicita 2013 - installation created in Agliè (Torino, Italy) as a homage to Guido Gozzano's poem La signorina Felicita ovvero la Felicità
Installation "Only for Your Eyes" by Lidia Chiarelli, on show at "Promotrice delle Belle Arti", Torino
"The Pathway of Poems for Peace" is the landscape installation created for the World Peace Day 2015, Agliè Italy