Halls of Anguish

The Halls of Anguish level is the first dungeon level of Nihlathak's Temple in Act V.

Background

Diablo II Level Info [e]

Halls of Anguish
(v1.10+)	Norm	Night	Hell
Area lvl	33	63	83
Possible monsters	Prowling Dead, Night Lord, Death Brigadier (guest), Devilkin (guest), Devilkin Shaman (guest), Returned, Horror Mage, Temple Guard (guest), Flayer (guest), Tomb Creeper (guest), Scarab
Monster Variants	2	#	#
Random Bosses	Fill out	Fill out	Fill out
Super- uniques	Fill out	Fill out	Fill out
Gold-chest	Yes
Waypoint	No
Nearby levels	Nihlathak's Temple, Halls of Pain
Quests	Betrayal of Harrogath (on last level)

The first level of Nihlathak's Temple, which is mostly just a transition down to the Halls of Vaught and Nihlathak himself.

Looking at the interior of these halls, it seems likely Nihlathak has been in the service of demons for a long time.

Nihlathak's Temple is basically just one dungeon with levels, but instead of just being named "Level X", they have their own names:

Monster levels are usually always equal to the area level with exception to uniques (mlvl +3) and champions (mlvl +2).