Marina Abramovic - The Artist is Present (2010)

A 736.5-hr static, silent performance piece in which Abramovic sat immobile at a small table in the museum’s atrium across from one spectator at a time. Believe it or not, the atmosphere was overwhelming and spectators wound up breaking down. The piece inspired blogs and FB support-group pages—the performance was just that powerful. 

“The audience gazes back, and inevitably begins to grasp the power [Abramovic’s] spell. As art critic Arthur Danto observed, ‘The Artist is Present represents an entirely new experience in the history of art. For most masterpieces, people stand in front of it for 30 seconds. Mona Lisa: 30 seconds. But people come and sit here all day.’”