How many movies have Hans D. Bornhauser and Renate Markl collaborated on?

They have worked on 1 movie together! Their first movie together was Semmel, Wurst und Birkenwasser - Die liebestollen Handwerker (1972) and was their highest rated movie together. They have not worked together since Semmel, Wurst und Birkenwasser - Die liebestollen Handwerker (1972).