The particular art intervention that took place here in 2004 was the wrapping of the Lord Napier statue in bright red tape.

Art intervention

Art intervention is an interaction with a previously existing artwork, audience or venue/space. 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.

• http://en.wikipedia.org/wiki/Art intervention