How many movies have Käthe Dorsch and Robert Heymann collaborated on?

They have worked on 2 movies together! Their first movie together was Die Memoiren des Satans. 1. Teil - Doktor Mors (1917) and was their highest rated movie together. They have not worked together since Der Fluchbeladene. Die Memoiren des Satans. 3. Teil (1918).