- When Jack is eating dinner with the priest, music from Madama Butterfly is playing in the background. Mathilde and Clara's nickname for Jack is Mr. Butterfly.
- With the influx of cast and crew, the existing population of Castel del Monte - 129 people - was more than doubled. When a crew member needed emergency dental work, he had to go to a nearby town as the answering machine of Castel del Monte's dentist declared that he was "unavailable, due to his appearance in a Hollywood film."
- Jack / Edward uses Walther PPK pistol, just like James Bond.
- This film marks the first time since Frühlingssinfonie (1983) that German musician Herbert Grönemeyer composed the music for a theatrical motion picture (his second time overall).