The building has an arched roof, in the same manner as an airplane hangar.
He knew that arched roof and these rough, stone walls.
Its floor was scattered with bits of stone, most likely fallen from the arched roof.
He had seen smooth stone, an arched roof, and a clean, sandy floor.
The arched roof, the entrance tunnel, the ring of stones around the fire.
One end had an open space under an arched roof big enough to hold a couple of small private airplanes.
It is thought that the arched roofs were once covered in marble.
An arched roof built of bricks or stone is called a vault.
The 2,400-square-foot structure is actually two buildings beneath a sweeping arched roof.
There are many open wells and several caves with arched roofs.