How many movies have Georg Friedrich Treitschke and Melanie Diener collaborated on?

They have worked on 1 movie together! Their first movie together was Fidelio - Beethoven - Opernhaus Zürich 2008 (2008) and was their highest rated movie together. They have not worked together since Fidelio - Beethoven - Opernhaus Zürich 2008 (2008).