Roman architecture was wack!

I'm reading about the temple of Fortuna primigenia, and it is amazing the way that Romans built on purpose a very steep series of stairs that led to a panoramic, focused, view of the temple for whoever is going up. It seems to me that all catholic sanctuary architecture is just an extension of this ancient Roman "view enginnerring".

 

In the same way the Romans "invented "concrete and used it in a very inventive way, a knowledge that was lost by the middle ages. They played with concrete, building in unusual shapes like domes, vaults and more.

 

What is Bernd opinion about Roman architecture? Favourite building?