The Mona Lisa is on The Stairs , by robert filliou , 1969 , installation , Neo-Dada style , Furniture, Shelf
A sign hanging on a pole next to a door.
There is a white wall with a door on it. There is a brown sign hanging from the wall. The sign is attached to a brown pole that is sticking out of a blue trash can. The trash can has a white bag hanging from it. 