Milan's council withdrew permission to stage a murder scene in a popular tourist spot. They subsequently banned the film despite even after 45 minutes of questionable material had been removed.
Filming was highly problematic, as Luchino Visconti found himself continually denied promised permits, and was forced to shoot in unsuitable locations. To add insult to injury, he was forced to make some deep cuts to his finished film.
When it was first released in the US in 1961, about half an hour of footage was cut out as it was deemed to be too violent for American audiences.