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Continuity
When Uhl opens The Orange Tree folder in the theatre and sees the plans for the locket for the first time, there is a hole in the center of the sheet of paper. When Uhl is in the stables and looks at the plans a second time, the hole has disappeared.
Eisenheim's eye color is different as an adult than it was as a child.
When Uhl opens The Orange Tree folder in the theatre and sees the plans for the locket for the first time, there is a hole in the center of the sheet of paper. When Uhl is in the stables and looks at the plans a second time, the hole has disappeared.
When Eisenheim is arrested, his arms are at his side and crossed at the exact same spot during his arrest at the beginning of the show (current time) and the flashback.
At around the 20:17 mark, When Inspector Uhl is inspecting the props backstage, Eisenheim has his arms at his side during their conversation. Then suddenly he is facing the inspector at a different angle and his arms are crossed.
Crown Prince Leopold would be called "His Imperial Highness", never just "His Highness".
Choreographer Marleen Pennison, Movement Coach for the film, is incorrectly credited as "Maureen Pennison".
When Uhl inspects Eisenheim's place, he finds a notebook titled "The Orange Tree". The story takes place In Vienna, where German is the spoken language until this day. Therefore, the notebook's title should have been "Der Orangenbaum", and not as shown.
When Inspector Uhl is investigating Eisenheim's latest illusion of summoning spirits, one of his aides shows an early turn-of-the-century movie projector portraying a color/sepia-based image of a person. Turn-of-the-century film was often hand-colorized using stencil methods. Georges Méliès' fantasy shorts used that method. Several genuine color film technologies were also in use by the early 1920's.
When giving a private exhibition to the Crown Prince and assembled nobles, Eisenheim explains the legend of King Arthur and the Sword in the Stone, referring to the sword as Excalibur. Many literary works identify Excalibur as the sword given to Arthur by the Lady of the Lake after the sword from the stone was broken, but others conflate the two swords. As Arthurian legend is not factual history, neither version is more valid than the other.
The heart shape pendant shows how it was opened, but inside there is a picture which has no creases or folds. This would be impossible with the way the item was designed as per the instructions found on the paper.
When Eisenheim gives the coins to the street urchins, the first coin is visible in his hand before the trick.
When the crown prince slaps Sophie's face, his hand is visibly well away from her face.
Leopold shoots something before his conversation with Uhl. While they are talking, the object is dragged off screen (lower right). It's far too rigid and light to be a just-shot animal.
The attachment of Prince Leopold's fake mustache can be seen on occasion.
The coins the Illusionist gives the poor children each have a ring surrounding a differently colored disc. The technology to make those coins is only a few decades old. They're Czech 50 heller coins, introduced in 1993.
As Eisenheim puts stacks of notes into his leather briefcase at the bank, a silver zipper is visible on the bag. Some early prototype of zippers did exist, but were not in common use well into the 20th century.
At the train station, the green trains have large, white, bold lettering in Helvetica, a font invented in 1957.
Wires are visible overhead at the railroad station. They're part of an overhead line system, which powers electric locomotives.
When police officers 'offer a drink' to Eisenheim, on the building in the background is a lightning rod of modern design.
When Inspector Uhl finds Leopold to tell him of Sophie and Eisenheim's relationship, Leopold asks "What where they doing? Touching? Kissing? Fornicating?" His face is only shown when he says "fornicating", but he mouths a completely different word. (see Trivia)
When the crown prince slaps Sophie's face, the slapping sound is heard a fraction of a second later than the slap occurs.
In Leopold's office, the overhead light banks are clearly visible the top of the frame.
Duchess Sophie tells Eduard that Crown Prince Leopold intends to win over the Hungarians by aligning himself with her family, the Duchy of Teschen. This duchy was in the Empire's Austrian half, not the Hungarian half. Today it is split between Czechia and Poland.
The whistle on the train leaving the station sounds much like an American locomotive whistle, rather than the typical high pitched European steam whistle.
Near the end, Chief Inspector Uhl is in Prince Leopold's office. When the two argue, the boom mic is visible, going from one character to the other, in the reflection on the brass table lamp.