Nosferatu (1922)

This is one of my favorite movies ever, most say the faithful adaptation of Dracula.
An unauthorized production of Bram Stoker's work (The legal heirs didn't give their permission), so the names had to be changed. But this wasn't enough: The widow of Bram Stoker won two lawsuits (1924 and 1929) in which she demanded the destruction of all copies of the movie, however happily copies of it were already too widespread to destroy them all. Later, the Universal studios could break her resistance against this movie. Count Orlok's move to Wisburg (Obviously the real "Wismar") brings the plague traceable to his dealings with the Realtor Thomas Hutter, and the Count's obsession with Hutter's wife, Ellen the only one with the power to end the evil.