Pierre Pinoncelli
Pierre Pinoncelli (15 April 1929 – 9 October 2021) was a French performance artist, best known for damaging two of the eight copies of Fountain by Marcel Duchamp with a hammer, as a statement that the work had lost its provocative value. The most recent attack happened on 4 January 2006 at Centre Pompidou in Paris and the first at an exhibition in Nîmes on 25 August 1993, where he also urinated into it before using the hammer.