The 11th of February 1979 is the day of Ladislav Baldreich's death, the director's grandpa.
Year 1893 - year of publication of the Winnetou novels by Karl May.
April 1, 1893 - introduction of a uniform time determination for Central European Time.
There are over 50 VFX shots in the film.
Five Stages of Grief are Denial, Anger, Bargaining, Depression, Acceptance.
The characters John Parker, Pete Parker and Jack the Madman are based on the characters of the same name from the short film "John Parker and the Madman"