Urban play

Square in Amsterdam
Nice result in 8 days and help of 100 volunteers.
Later police removed it during the night, it didn't have to happen like this.
Scott Burnham:
"It seems that the Amsterdam police were called by a resident of one of the overlooking buildings early Sunday morning to report that someone was "stealing an artwork". As the story goes, people were pocketing a few of the coins, which was also expected, but things got a bit out of hand when a resident saw this happening. So the police responded, and, in a rather bizarre instance of police efficiency, they proceeded to "secure" the artwork, by sweeping up the entire installation."

More info here
Photos here