How many movies have Max Ophüls and Oscar Straus collaborated on?

They have worked on 3 movies together! Their first movie together was From Mayerling to Sarajevo (1940) while their highest rated movie together was The Earrings of Madame de... (1953). They have not worked together since The Earrings of Madame de... (1953). They are most known for their romance films together.