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Conceptual art, sometimes called idea art, is art in which the ideas embodied by a piece are more central to the work than the means used to create it. It was described by the artist Sol LeWitt like so:
Conceptual art first came to be made in the 1960s and 1970s. It is generally seen as an expansion of minimalism. Many artists turned to conceptualism because of a belief that creating commercially marketable works was in some way unethical.
Conceptual art often makes use of materials such as photographs, maps, and videos. It is sometimes reduced to a set of instructions documenting how to make a work, but stopping short of actually making it--the idea behind the art is more important than the artefact itself.
Out of this concept artforms like fluxus and mail art have emerged.