Babel Tower (or Demon World Tower ) is the place where several elite demons in the Demon World converge. The topmost three elite classifications are currently revealed as the One Demon King, the Three Great Demons, and the The Thirteen Crowns.
The Babel Tower consist in total of 666 floors, with each floor depicting as a workplace of the Demon Group, and each at different levels.
Discussions among 10 of the 13 crowns (also known as the great heroes of the Netherworld) often occur in this floor. In some occasions, the remaining members of the crown (the Three Great Heroes) can also visit this floor to join meetings if necessary.
Once in a while, they organize a banquet called The Thirteenth's Dinner and invite several special guest for the occasion. An onyx-colored plate-like shape, with the writing inscribed at the center, is handed out to those guests respectively as an invitational message.
This floor are strictly only for the Three Great Heroes are located.
The following demons are most often ones found at the tower:
|Three Great Heroes|
|Lord Sullivan||Lord Beliar||Lady Levy|
- Mairimashita! Iruma-kun Manga Chapter 200