9. Christian Marclay

Not only is Marclay responsible for The Clock (2010), the epic, real-time, 24-hour montage that won the Golden Lion Award, but he's also behind a number of other photographic works and collages that function much in the same way. His Fourth of July series from 2005 features a number of torn C-prints, mounted and reframed. The idea of the photograph as document has not only been disabled by Marclay's intervention, but the photo itself is paradoxically transformed into an object aware of its own flatness and inability to do anything but show the image it carries on its surface. There is something both pathetic and charming about this series of photographs whose full stories can never be told.

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Above: Untitled from the Fourth of July series, 2005