In the summer of 2014, tens of thousands of guests flocked to the Serpentine Gallery in London to experience Marina Abramović’s exhibition ‘512 Hours’. But when it opened, it dawned on everyone that the audience itself was the actual work in the iconic performance artist’s landmark exhibition. The audience members were also active participants and co-creators of the social experiment, which - set against the minimalist background of the gallery’s empty space - developed continuously into new, unpredictable directions during the three weeks (or 512 hours) in which the exhibition took place, while Abramović herself took part in the performative ritual.