How many movies have Fritz Umgelter and Harald Dietl collaborated on?

They have worked on 6 movies together! Their first movie together was Die Räuber (1959) while their highest rated movie together was Die merkwürdige Lebensgeschichte des Friedrich Freiherrn von der Trenck (1973). They have not worked together since Die merkwürdige Lebensgeschichte des Friedrich Freiherrn von der Trenck (1973). They are most known for their drama films together.