Question

A style of architecture, introduced by the Persians, in which a building had two layers of ceiling to form a big bulbous dome .
I'll mark you as the brainliest if you give the right answer...​

Answer 1

It's called Iranian Architecture and all the domes are made using this study (Iranian Architecture study) only.

Hope this helps you mate!

Iranian architecture makes use of abundant symbolic geometry, by using pure forms such as circles and squares, and plans which are based on often symmetrical layouts featuring rectangular courtyards & halls.

I thought to give you some detail on Iranian Architecture also