At 5 p.m. Monday the longest piece of performance art on record, and certainly the one with the largest audience, comes to an end. Since her retrospective opened at the Museum of Modern Art on March 14, the artist Marina Abramovic has been sitting, six days a week, seven hours a day in a plain chair, under bright klieg lights, in MoMA’s towering atrium. When she leaves that chair Monday for the last time, she will have clocked 700 hours of sitting.
Full Story at  http://www.nytimes.com/2010/05/31/arts/design/31diva.html