Vault of Aerode is a location found in The Elder Scrolls III: Morrowind.
It is one of the several sublocations of the Dunmer Stronghold Kogoruhn. Which serves as a Sixth House base in Vvardenfell. The vault is a small room, where Dagoth Ulen, a Bonelord can be found. It can be accessed only through the Hall of Maki.
During this part of the Main Quest, the Nerevarine is sent by Ashkhan Sul-Matuul to Kogoruhn to prove their qualities. The Hero must retrieve three items, none of which can be found within the Vault of Aerode. Thus, it is not strictly necessary to enter the room to complete the quest.