How many movies have Gustav Mahler and Leonard Bernstein collaborated on?

They have worked on 3 movies together! Their first movie together was Mahler - Symphonies Nos. 1, 2 & 3 (1973) and was their highest rated movie together. They have not worked together since Mahler - Symphonies Nos. 4, 5 & 6 (1976). They are most known for their music films together.