The Einstein Tower in Potsdam (The Coelostat in the Upper Dome That Catches and Projects the Light of the Stars into the Laboratory)

Sasha Stone, born Aleksander Serge Steinsapir was a Russian artist. A stateless photographer, he and his first wife, Cami Stone, were successful photographers during the 1920s and 1930s. One of his best-known works is the photomontage he designed for the cover of Walter Benjamin's Einbahnstraße published in 1928.