Traditionally, the office of the Defense Against the Dark Arts professor was located on the third floor. However, Cassius, the professor this time, was entirely different from his predecessors—he had requested Headmaster Dumbledore to grant him an office down in the dungeons.
This was quite understandable. After all, vampires were much better suited to dark and gloomy environments. Although Cassius was immensely powerful and did not fear the light like lower-level vampires, he still preferred dimmer surroundings.
For a rare talent willing to take on this cursed position and remain unaffected by it, Dumbledore naturally had no reason to refuse such a minor request, especially since Cassius was very likely to serve a long tenure at Hogwarts. Vampires possessed a natural immunity to curses because they themselves understood and excelled at them.
Chapter 35