It is undoubtedly an architectural work like few others. You know that before those designs were used as advertising methods to attract the faithful to the church, to give them a vision of heaven with all the paintings, sculptures, stained glass windows and so on.

In those days people were humble and uneducated, so seeing these things was like going to a 4k movie theater for them. So it is interesting to know why the church used these designs in all its buildings, something that is still maintained in relatively more modern buildings.