Nightingale

Nightingale, the city of Moonlight, is the biggest city in the Vampire world, and is also the most important. The exact size of the city is not known, but vampire scholars believe the city contains the size of a relatively large country.

Limbo
Limbo is the maximum security prison called of Nightingale. This place was where the most dangerous vampires in the world were locked away. Vampires who'd committed petty crimes against Nightingale are also locked up in here. It is a prison that lay in another dimension, it had seven levels, with the 7th level being the lowest, and where the most dangerous vampires were locked up. From the 1st to 4th level, punishments varied according to their crime. The first level contains criminals with the lightest offenses, and also serves as a rehabilitation center for those noble vampires.