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, renowned for being an unconquerable dungeon.

Surface

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

1st~3rd Floor: Catacombs

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

4th Floor: Underground Lake

 * Floor Guardian: Gargantua

5th Floor: Glacier

 * Floor Guardian: Cocytus
 * Known Areas
 * Frozen Prison: A two-story building that looks similar to the house of fairy tales, though it is frozen on the surface, making its appearance bleak. Captured enemies of Nazarick are locked here, guarded by Wraith-type undead monsters.
 * Room of Truth: Neuronist Painkill's room.
 * Room of Nigredo: Nigredo's room. One should get a baby doll from the entrance and give it to Nigredo to calm her down before starting conversation.
 * Snowball Earth: Cocytus' residence. It is a white dome looking similar to an overturned vespiary. Six large crystals surround this structure, which are residences of Frozen Virgins (level 82).


 * This floor is a wide area filled with numerous icebergs. Weather phenomena including cloud and snow are present here. There used to be an area penalty that caused slow and gave ice-type damage, but it was turned off to save costs on maintenance after the teleportation.

6th Floor: Jungle

 * Floor Guardian: Aura Bella Fiora, Mare Bello Fiore
 * Known Areas
 * Gigantic Tree: Aura and Mare's residence.
 * Amphitheatrum: Built as a copy of the Roman Colosseum. Golems act as the audience, while VIP seats are prepared for guild members. Dragonkins (level 55) work as cleaners.
 * Village: Area developed after the teleportation. Dryads, treants, and some lizardmen live in the village, raising mandrakes, apples, etc.
 * This floor is about 200 meters in height. A fake sky exists on the ceiling, reproducing the day and night cycle. There is no weather except wind in this area, so Mare occasionally summons rain.

7th Floor: Lava

 * Floor Guardian: Demiurge
 * Known Areas
 * Blazing Temple: Demiurge's residence. The entrance to the 8th floor is inside the temple. Seven Evil Lords(around level 80) guard this area.
 * ??? : Area guarded by Guren.

8th Floor: Wilderness

 * Floor Guardian: Victim
 * Known Areas
 * Sephiroth: Victim's residence.
 * Cherry Blossom Sanctuary: An area guardian exists here. Ainz entrusted the Staff of Ainz Ooal Gown in this place.
 * The 8th floor is Nazarick's final defense line, guarded by the most powerful NPCs. Capture of the 8th floor means that Ainz Ooal Gown's chances of victory is low. This floor seems to be dangerous even to NPCs of Nazarick as Ainz forbade them to enter the 8th floor. At least one world class item exists here.

9th Floor: Royal Suite

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

10th Floor: Throne

 * Known Areas
 * Room of the Pleiades Six Stars: Located right after the entrance of the 10th floor.
 * Clavicula Salomonis: 67 Golems (inspired from the Spirits of Solomon) and elemental traps exist in the hall.
 * Throne Hall: Albedo's original residence. Two world class items exist in this hall, including Albedo's "True Nought, Ginnungagap".
 * The Oldest Library: Stores book-shaped items along with normal books. Magic scrolls are also manufactured in this area. It is guarded by five overlords(over level 75), whose names are based on the Five Good Emperors of Roman Empire (Cocceius, Ulpius, Aelius, Fulvius and Aurelius).

Treasury

 * Area guarded by Pandora's Actor. This place is spatially isolated from other areas, so a Ring of Ainz Ooal Gown is necessary to enter treasury.
 * Known Areas
 * 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 the mausoleum with a Ring of Ainz Ooal Gown, the Avataras will attack that person.

Background
The Great Tomb of Nazarick originally only had 6 floors, but after Ainz Ooal Gown conquered it, it was completely reconstructed and was stretched to over 10 floors. As Ainz Ooal Gown acted as an "evil" guild, there were many attempts to capture the dungeon, but all of them were repelled without exception. The only attack that reached below the 6th Floor was an alliance of eight guilds and mercenary NPCs numbering about fifteen hundred people, though it was blocked on the 8th floor.