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 ;-)