Étant donnés by Duchamp

Étant donnés (Given: 1 The Waterfall, 2. The Illuminating Gas, French: Étant donnés: 1° la chute d'eau / 2° le gaz d'éclairage.) is Marcel Duchamp's last major art work which surprised the art world that believed he'd given up art for chess 25 years earlier. It is a tableau, visible only through a peep hole in a wooden door, of a nude woman lying on her back with her face hidden and legs spread holding a gas lamp in the air in one hand against a landscape backdrop.

Duchamp worked secretly on the piece from 1946 to 1966 in his Greenwich Village studio while even his closest friends thought he had abandoned art.

It is made of an old wooden door, bricks, velvet, twigs, a female form made of leather, glass, linoleum, and an electric motor. Duchamp prepared a "Manual of Instructions" in a 4-ring binder explaining and illustrating how to assemble and disassemble the piece.

It wasn't until 1969 that the Philadelphia Museum of Art revealed the tableau to the public.

from: Wikipedia article



more info here (including diagram): Marcel Duchamp - Étant donnés: The Deconstructed Painting