Poll: Favorite Martin Scorsese Documentary

Martin Scorsese is frequently considered one of the best film directors in history. This merit mostly takes into account his feature films. But much of his career as a documentarian cover documentaries ranging from social issues to aspects of life of Italian-Americans to biographies of great musicians. What is your favorite documentary directed by Martín Scorsese or, if you haven't seen any, which one would you most like to see? The list excludes titles with less than 100 votes in IMDb and those that have been directed by several directors. Discuss this list here