The Doctor of St. Pauli

The Doctor of St. Pauli (Der Arzt von St. Pauli) is a 1968 West German crime film directed by Rolf Olsen and starring Curd Jürgens, Horst Naumann, and Christiane Rücker.

Plot
In St Pauli, the red light district of Hamburg, a sympathetic Doctor helps treat the poor of the area. His villainous brother, by contrast, is associated with the rich and criminal.