Franz Joseph I of Austria never blamed his wife, the Empress Elisabeth of Austria, for the death of Archduchess Sophie of Austria. The criticism of Elisabeth's parenting came from her mother-in-law, Princess Sophie of Bavaria.
Empress Elisabeth of Austria was assassinated by a left-wing Italian anarchist, Luigi Lucheni, who was armed with a sharpened file, on 10 September 1898 at the Lake Geneva docks. She did not commit suicide by jumping off a ship.
In the fencing room scenes the doors have modern panic hardware and lighted exit signs.
Although the film is set in 1878, electric table lamps and lights are clearly visible inside buildings. The Hofburg and Schönbrunn palaces were not fitted out with electricity until around 1900. Before that gas lighting was used.
Modern aluminum mop, and plastic bucket is visible in one of the back corridor scenes and a modern telephone is visible in a couple of the back corridor scenes.
Help Me Make It Through the Night was written and recorded By Kris Kristofferson in 1969.Not likely to have been sung in the 1800's.
Modern 1950s tractor is visible in the railroad crossing scene.
Modern stainless steel railing and concrete material in swimming pool scene.
In the first fencing scene the emergency signs could clearly be seen. In the later fencing scene the signs are still visible as a bright spot but seem to be blurred with CGI.