How many movies have Edgar G. Ulmer and F. W. Murnau collaborated on?

They have worked on 6 movies together! Their first movie together was The Finances of the Grand Duke (1924) while their highest rated movie together was Sunrise: A Song of Two Humans (1927). They have not worked together since Tabu: A Story of the South Seas (1931). They are most known for their drama films together.