Since the surroundings are spacious, I did not fee...

Since the surroundings are spacious, I did not feel so huge when looking from the outside.
However, entering inside it is overwhelmed by the huge space.
How did you build such a huge building like this? How did you put a huge disk with Arabic letters in it?
Wonders and doubts come to mind one after another.
I think that I do not know this feeling of space unless we go to practice.
It is the world's best temple.