Location from Overlord by Kugane Maruyama
A ten-floor underground tomb that was a guild headquarters in a game and became the seat of an undead empire in reality — 2,750 NPC levels of terror organized by floor.
The Great Tomb of Nazarick was conquered by the guild Ainz Ooal Gown in YGGDRASIL and served as their headquarters. It was transported to the New World along with all its NPCs when the game servers shut down. A 1,500-player alliance once attempted to raid it and was stopped on the 8th Floor — no one has ever reached the Throne Room. The tomb is self-sustaining, has multiple defense systems (Administration, Mercenary, Ariadne route-finding, Patrol, Circular Notice), and contains resources that dwarf anything in the New World. It is simultaneously a military fortress, a bureaucratic government center, a spa resort (9th Floor), and the personal kingdom of a panicking skeleton who inherited it all.
Surface: a 200-meter cemetery with four mausoleums and eight armored statues. Below: ten floors descending from catacomb corridors to a frozen glacier to a 4-square-kilometer jungle to a lava hell to a throne room of white and gold. Each floor has its own aesthetic, ecosystem, and Guardian.
Also known as: Nazarick, The Great Tomb, The Tomb