German artist Gustav Metzger's work was rubbish — literally. In 2004, the artist's installation Recreation of First Public Demonstration of Auto-Destructive Art was on display at the Tate Britain when a museum employee threw part of it away… a plastic bag of trash sitting next to the artwork… was actually part of the artwork?
A cleaner has mistakenly thrown away contemporary artworks meant to be part of an exhibition in southern Italy.
Works made out of newspaper and cardboard, and cookie pieces scattered across the floor as part of Sala Murat's display were thrown out... the unnamed cleaner was "just doing her job".
“It's not what you look at that matters, it's what you see.” Henry David Thoreau