Respuesta :

Answer:

the answer is dome (I'm only writing this part because the answer needed to be longer)

Answer:

its a vault

Explanation:

because a dome is a cap on top of a building and also how would it be a dome if its curved ceiling and a ceiling is on the inside. vaults are made with curved rows of arches formed to make a curved ceiling.

Please mark brainliest and hope this helps ;-)