Beethoven's doctor ordered him to spend the summer of 1812 at the spa in Teplitz. It is certain that he was at Teplitz when he wrote a love letter to his "Immortal Beloved." Her identity has long been a subject of debate with possible candidates including Julie Guicciardi, Therese Malfatti, Josephine Brunsvik, and Antonie Brentano.
While the actual performances of Beethoven's piano pieces in this film were not played by Gary Oldman, the actor practiced five hours a day so that his movements would be in time with the performances of Murray Perahia, which were done off-camera.
The film is told through Schindler's eyes, but the real Schindler was not a friend of Beethoven and had only a short tenure as the maestro's secretary. It has been claimed that Schindler destroyed 260 of the approximately 400 conversation notebooks and forged entries into the surviving ones.