One and Three Chairs
One and Three Chairs is a piece created by Joseph Kosuth in 1956. This is conceptual art. Meaning that it is based entirely on the concept the artist wishes to portray rather than a mode of presentation. Kosuth presents the viewer with a photo of a chair, an actual three dimensional chair, and the dictionary definition of the word chair. As a viewer you must ask yourself, "What is real here? Without a definition, would one know what a chair was?" This type of art is also referred to as the science of signs.
Conceptual art does not always have a physical presentation. It is often only an exchange of ideas or instructions. This kind of art is not meant to be bought or sold. It is only done for the sake of exchanging ideas.