Double Self-Portrait, Theo van Doesburg (attributed to), 1921
Diffuse light casting no shadows had been standard as long as photography had existed. Taken in 1921 this double portrait is unusual because of the glaring sunlight shining down from above. The sitters are the artist Theo van Doesburg and his new love and future wife Nelly van Moorsel. It is assumed that Theo and Nelly made the portrait themselves, even though someone else will have actually held the camera.