During the ball scene, a full orchestra can be heard while only a chamber orchestra (less than ten people) appears on the screen.
When Isabel is attempting to retrieve her parasol from Mr. Osmond, all camera shots of her show the bow around her neck to her right. However, there is one camera shot that shows the bow to her left.
they show piazza del Campidoglio in Rome as it was when they made the movie but the paving was put in place only in 1940, although following the 16th century project by Michelangelo, and the statue of Marcus Aurelius was regularly in place. It was removed for restoration in 1981 and then substituted by a copy in 1996.
(at around 47 mins) A horse carriage is passing through the shot from right to left. The crew with dolly-cam and equipment is clearly visible.