Conceptual art holds that the idea behind a work matters more than its visual form. Emerging in the mid-1960s and cresting in the early 1970s, it pushed art toward language, documentation and systems: Sol LeWitt's 1967 declaration that "the idea becomes a machine that makes the art" is its classic formula. Artists produced instructions, maps, photographs, typed statements, time pieces and temporary installations, deliberately dematerializing the art object and its market. Joseph Kosuth staged objects, images and definitions side by side; Lawrence Weiner made sentences into works; On Kawara dated paintings; Art & Language wrote theory as practice. With Duchamp's readymades as its warrant, conceptual art turned institutions, categories and the question "what is art?" into its raw material, and its habits of documentation and critique still frame contemporary art.
Marcel Duchamp , 1917, Fountain , photograph by Alfred Stieglitz at the 291 (Art Gallery) following the 1917 Society of Independent Artists Public domain (credit: Marcel Duchamp / Alfred Stieglitz) · source
Defining characteristics
Idea and instruction privileged over visual form
Language, text and documentation as the work itself
Dematerialized object; ephemeral or unrepeatable presentation
Institutional critique: categories, galleries and definitions interrogated
Systematic, often dry execution; anti-expressive surface
Key figures
Sol LeWitt(1928-2007) — Theorist of the wall drawing and the idea as generator of art
Joseph Kosuth(b. 1945) — Staged objects, images and definitions to test what art means
Lawrence Weiner(1932-2021) — Made language itself the artwork
On Kawara(1933-2014) — Reduced art to time, date and the record of being alive
Marcel Duchamp(1887-1968) — Precursor whose readymades licensed the movement