Great Tomb of Nazarick

The Great Tomb of Nazarick (ナザリック 地下大墳墓) is the guild headquarters of Ainz Ooal Gown, known as unconquerable dungeon.

Overground

 * 200 meters in diameter. 6-meter-high walls surround the tomb. Four affiliated tombs are in the four cardinal directions. In center, largest tomb exists with entrance into the underground tomb. This central tomb is the upper-most part that one can teleport by using Ring of Ainz Ooal Gown.

1st~3rd Floor: Catacombs

 * Floor Guardian: Shalltear Bloodfallen
 * Known Area
 * Black Coffin: Residence of Prince of Terror. Located in the 2nd floor.
 * Grave Vault of Adipocere: Residence of Shalltear. Located in the 2nd floor.

4th Floor: Underground Lake

 * Floor Guardian: Gargantua

5th Floor: Glacier

 * Floor Guardian: Cocytus
 * Known Area
 * Frozen Prison: Two-story building. Looks similar to the house of fairy tale, but it is frozen in surface which makes its appearance dreary. Wraith-type undead monsters exist in the house.
 * Room of Truth: Room of Neuronist Painkill
 * Room of Nigredo: Room of Nigredo. One should get a baby doll from the entrance and give it to Nigredo to calm her down and talk.
 * Snowball Earth: Residence of Cocytus. White dome similar to overturned vespiary. Six large crystals surround this structure, which are residences of Frozen Virgins (82 level).


 * Wide area filled with numerous icebergs. Weather phenomena exist such as cloud and snow. Area penalty that slows and gives ice-type damage existed, but it was turned off to save cost of maintenance after the teleportation.

6th Floor: Jungle

 * Floor Guardian: Aura Bella Fiora, Mare Bello Fiore
 * Known Area
 * Gigantic Tree: Residence of Aura and Mare.
 * Amphitheatrum: Copy of the Colosseum. Golems are audience, while VIP seats are prepared for guild members. Dragonkins (55 level) works as cleaners.
 * Village: Area developed after the teleportation. dryads, trents, and some lizardmen live in the village, raising mandrakes, apples, etc.
 * About 200 meters in height. Fake sky exists in the ceiling, which also reproduces day and night, yet there are no weathers except wind. Thus Mare sometimes calls rain in the area.

7th Floor: Lava

 * Floor Guardian: Demiurge
 * Known Area
 * Blazing Temple: Residence of Demiurge. Entrance to the 8th floor is in the temple. Seven Evil lords(around 80 level) guard this area.
 * ??? : Area guarded by Guren.

8th Floor: Wilderness

 * Floor Guardian: Victim
 * Known Area
 * Sephiroth: Residence of Victim.
 * Cherry Blossom Sanctuary: An area guardian exists. Ainz entrusted the Staff of Ainz Ooal Gown in here.
 * Final defense line of Nazarick. Guarded by most powerful NPCs. Capture of the 8th floor means the chance of winning is low to Ainz Ooal Gown. This floor seems to be dangerous even to NPCs of Nazarick, as Ainz forbade other NPCs to enter the 8th floor. At least one world class item existed in the 8th floor.

9th Floor: Royal Suite

 * Living space for guild members. Various amenities such as bar, lounge, general store, boutique, nail art shop, etc exist in the 9th floor. These facilities were just for decoration in YGGDRASIL, but they became real after the teleportation.
 * Known Area
 * Bar: Managed by the Sous-chef.
 * Spar Resort Nazarick: Large public bath with 97 bathes in total.

10th Floor: Throne

 * Known Area
 * Room of Pleiades Six Stars: Right after the entrance of the 10th floor.
 * Clavicula Salomonis: 67 Golems (motivated from Spirits of Solomon) and elemental traps exist in the hall.
 * Throne Hall: Original residence of Albedo. Two world class items exist in this hall, including Albedo's "True Nought, Ginnungagap"
 * The Oldest Library: Stores book-shaped items, normal books. Also magic scrolls are manufactured in this area. Guarded by five overlords(over 75 level), whose names are following Five Good Emperors of Roman Empire (Cocceius, Ulpius, Aelius, Fulvius and Aurelius).

Treasury

 * Area Guraded by Pandora's Actor. This place is spatially isolated from other areas, and thus Ring of Ainz Ooal Gown is necessary to enter treasury.
 * Known Area
 * Chief Manager's Room: Residence of Pandora's Actor
 * Mausoleum: The vault for World Class Items. Guarded by 37 golems named Avatara. If one enters mausoleum with Ring of Ainz Ooal Gown, Avataras will attack him/her.

Background
The Great Tomb of Nazarick orignaly had only 6 floors, but after Ainz Ooal Gown conquered it, there was a reconstruction and it stretched over 10 floors. As Ainz Ooal Gown acted as "Evil" guild, there were many tries to capture the dungeon, and all of them were beaten without exception. The only attack reached below 6th Floor was an alliance of eight guilds and mercenary NPCs, numbering a total of fifteen hundred, and it was also blocked in the 8th floor.