This is one of the numerous barracks for the guards of Deathís Stronghold. The one you are in now isnít the main one but the numbers normally seen here would lead you to think so. Though the area is dim lit and there is a lot going on in the area there are guards that are assigned to watch and look for things out of place at all times.
50 or more guards at all times in this area. Grey & black sleens extremely common.