Stefan Sagmeister
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Obsessions Make My Life Worse And My Work Better was an installation by Stefan Sagmeister for Droog Design. It was made in Amsterdam in september 2008. It took 350 000 euro cent coins, 3 days of work and 150 volunteers. It was entirely removed by the police the day after it was finished.
(I know this is an old one but I just love this piece. Had to put it here.)