Referring to the city of Dis, from Dante's levels of hell. The city of Dis is the level of hell to which all non-believers, who have not otherwise sinned greatly, will go. The city is surrounded by a field containing countless numbers of burning coffins, in which the heretics lie, screaming. Limbs from non-believers are scattered around the plains, and the city itself is surrounded by thick iron walls.
The city of Dis is populated by the dead non-believers.