How many movies have Georg Friedrich Treitschke and Joseph von Sonnleithner collaborated on?

They have worked on 3 movies together! Their first movie together was Fidelio - Beethoven - Opernhaus Zürich 2008 (2008) while their highest rated movie together was Beethoven: Fidelio (2022). They have not worked together since Beethoven: Fidelio (2022). They are most known for their music films together.