In a few scenes in the movie - when Anne and Henry bicker about the Act of Succession and when Anne and Elizabeth are playing before Anne's arrest are two - there is paneling on the walls, with carvings of Catherine of Aragon and Catherine Howard's badges. Now one could understand that Catherine of Aragon's may have still been up, but Catherine Howard didn't have a badge then, she was just a young girl.
Irene Papas is Greek by origin. Thus, she is Orthodox Christian. But Katherine of Aragon is supposed to be Spanish and a Catholic Christian. When Ms. Papas enters the court and makes the sign of the cross on her chest, she does it in the Orthodox way, using the three fingers. not the whole palm of her right hand.
When Katherine is listening to music with her ladies in waiting, a tapestry from the cycle of the Lady and the Unicorn is clearly visible in several shots, as well as in a few other subsequent scenes. These were made in Florence and were eventually rediscovered in France. They were never in England.
During the papal trial presided over by Cardinal Campeggio, Cardinal Campeggio and Cardinal Wolsey sit before a coat of arms clearly labeled "Clement VII" (which is correct) but the papal arms incorrectly displays a blue shield with six gold discs. Clement VII was a de Medici and his papal arms used the de Medici arms of a gold background with five red discs arranged under a single blue disc containing three gold fleur-de-lis.