Vast quarries and hundreds of abandoned cities make up this layer ruled by the Lord of the Seventh. The facts of this layer differ largely between the editions, with the early editions this layer was the home of hundreds if not thousands of abandoned cities of perfect grids and towers, beautiful fountains and exquisite decorations adorn every tower and yet they largely remain abandoned. The Lord, unhappy with even a single tiny detail in a city, will order the petitioners of this plane to build new and better cities, his satisfaction has never been met and so they continue to toil away, strip mines belching filth into the air and stripping the ancient cities of their resources. Anything natural here has long been destroyed and only a layer of devastation remains.

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In the later editions, the abandoned cities are replaced by massive libraries that horde all the contracts that devils make, filing them away for surprise inspections by pit fiends or even the archdevils. The Lord is in charge of these great repositories.

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​Grenpoli

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This city is known as the City of Diplomacy and is a strange sight among the ruins of this layer. The city is domed and the only points of access are through four gates that are heavily guarded. Entering the city requires all visitors to remove their weapons, leaving it with the guards who place them into storage. Displays of magical aggression, strife, and carrying weapons through the city are against the law, and any who break it is immediately slain by the powerful devils who police the streets. The city is known for The Political School of the Nine Hells, where the nobility of the devils come to learn about deception, telling untruths and treachery.

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To arrive at the lower layer, travelers must journey down into the deepest caverns where the air turns to frigid temperatures that drop way below freezing. Travelers can then find themselves stepping onto massive columns of ice and arrive in Cania.