Albert Einstein said of Ziffer:"Du bist ein Ziffer und ich bin Ein stein aber du arbeitest mit stein und ich arbeite mit ziffern" ("You are a figure (ziffer—figure, digit, number) and I am a stone (ein stein) but you work with stone and I work with figures").
Einstein also described his work as "simple and noble as the man who created it."
In 1947–48, Ziffer was awarded the Dizengoff Prize in Sculpture,[2] for his design of a wall at Haganah House, Tel Aviv.
Environmental sculptures
1938, "Unknown Pioneer", at New York International Fair
Memorial in honour of the breakthrough at the Burma Road, Hulda
