Night's Black Agents: Dracula Dossier
The Scholomance, according to legend, is a cave where the Devil holds his school, keeping the tenth pupil as his servant. Dracula, according to the writings of Van Helsing, attending the Scholomance in life; whether he escaped the Devil or serves him now remains unknown. There are few references to the location. Lake Hermannstadt is referenced but there is no such lake and the area of Hermannstadt is now known as Sibiu.
This location, if it exists, could be a major center of power for the dark forces that exist in Europe.