Art intervention is an interaction with a previously existing artwork, audience or venue/space. It has the auspice of conceptual art

Conceptual art

Conceptual art is art in which the concept or idea involved in the work take precedence over traditional aesthetic and material concerns. Many of the works, sometimes called installations, of the artist Sol LeWitt may be constructed by anyone simply by following a set of written instructions...

 and is commonly a form of performance art

Performance art

In art, performance art is a performance presented to an audience, traditionally interdisciplinary. Performance may be either scripted or unscripted, random or carefully orchestrated; spontaneous or otherwise carefully planned with or without audience participation. The performance can be live or...

. It is associated with the Viennese Actionists

Viennese Actionism

The term Viennese Actionism describes a short and violent movement in 20th century art that can be regarded as part of the many independent efforts of the 1960s to develop "action art" . Its main participants were Günter Brus, Otto Mühl, Hermann Nitsch and Rudolf Schwarzkogler. As "actionists",...

, the Dada

Dada

Dada or Dadaism is a cultural movement that began in Zurich, Switzerland, during World War I and peaked from 1916 to 1922. The movement primarily involved visual arts, literature—poetry, art manifestoes, art theory—theatre, and graphic design, and concentrated its anti-war politics through a...

 movement and Neo-Dadaists. It has also been made much use of by the Stuckists

Stuckism

Stuckism is an international art movement founded in 1999 by Billy Childish and Charles Thomson to promote figurative painting in opposition to conceptual art...

 to affect perceptions of other artwork which they oppose, and as a protest against an existing intervention.

Intervention can also refer to art which enters a situation outside the art world in an attempt to change the existing conditions there.