Art intervention is an interaction with a previously existing artwork, audience, venue/space or situation. It has the auspice of conceptual art and is commonly a form of performance art. It is associated with the Viennese Actionists, the Dada movement and Neo-Dadaists. It has also been made much use of by the Stuckists 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. For example, intervention art may attempt to change economic or political situations, or may attempt to make people aware of a condition that they previously had no knowledge of. Since these goals mean that intervention art necessarily addresses and engages with the public, some artists call their work "public interventions".
Although intervention by its very nature carries an implication of subversion, it is now accepted as a legitimate form of art and is often carried out with the endorsement of those in positions of authority over the artwork, audience or venue/space to be intervened in. However, unendorsed (i.e. illicit) interventions are common and lead to debate as to the distinction between art and vandalism. By definition it is a challenge, or at the very least a comment, related to the earlier work or the theme of that work, or to the expectations of a particular audience, and more likely to fulfil that function to its full potential when it is unilateral, although in these instances, it is almost certain that it will be viewed by authorities as unwelcome, if not vandalism, and not art.
There are many art interventions which are carried out in contexts where relevant invitation and approval has been given.
The extreme to which an authorised intervention can go and yet still meet with institutional approval was shown in 2002, when the Museum of New Art in Detroit staged a show kaBoom!, with the announcement, "Over the course of the exhibition, museum visitors will be invited to smash, drop, throw and slash artworks..." The show was scheduled for two months, but by the end of the first night had been totally destroyed by visitors:
A more usual authorised art intervention in an institution is done with great care to make sure that no harm comes to the existing collection. In 2004, the Old Town House in Cape Town, South Africa, hung its Michaelis Collection of 17th century Dutch Old Master paintings facing the wall. The curator Andrew Lamprecht said this exhibition, titled Flip, "would force gallery goers to reconsider their preconceptions about the art and its legacy." Knowledge of intent is integral to such a process, as it would be perceived differently if it were announced in a conservation context, rather than as an art piece. However, in this instance there was some ambiguity about the purpose of the exercise as Lamprecht, although stating, "I'm asking questions about the history", also added a more standard "educative" comment, "the reverse of the paintings revealed a wealth of detail not normally on view to the public, ranging from old attempts to preserve the canvas to notes from different collectors over the years", thus lessening the confrontational impact of his actions.