A cleaner threw away part of an art installation thinking it was trash. The unnamed woman was tidying the Sala Murat gallery in southern Italy and inadvertently discarded several items, including newspaper and cookie crumbs she believed had been left behind by workers. In fact, the tossed art was part of an exhibition about the environment. The cleaning company has apologized and explained that insurance will cover the damage, estimated at about $13,700. The cleaner isn’t the first to mistake modern art for garbage.