well done! the second floor DOES look nice, though I'd put more transparency to the stained glass so that we can see more the exterior through them, because it definitely looks best when all the glasses have been shot
Was it not possible to keep the embossed structure of the floor under the roof ? because that's really how it is in cathedrals...
I would have kept all the holes in the wall leading to the outside on that floor too, in my opinion that would provide much more ways to sneak in and out of the place.
I don't like the color for the barriers (red) 9_9 I know, that was the very texture I used, but I don't like it anyway
I would have put the entrance at the other side of the cathedral... no cathedrals have entrance by that side AFAIK. And made 3 doors in fact, double doors to be precise. That entrance door needs more detail too IMO.
I think you should put another texture for the wall surrounding the cathedral. And not that scale, but smaller...
The bell sound is awesome