Elvira Madigan (1967)
Elvira Madigan is a 1967 Swedish film directed by Bo Widerberg, based on the tragedy of the Danish tightrope dancer Hedvig Jensen (born 1867), working under the stage name of Elvira Madigan at her stepfather's travelling circus, who runs away with the deserter Swedish lieutenant Sixten Sparre (born 1854).
More at Wikipedia.