What a total treasure trove of details that cathedral is. I like how your overlay is much softer and works to compliment that great detail, instead of possibly obscuring or competing with it.
I like the energy created between the straight lines in the overlay against the angled lines of the cathedral. And the colors are nicely controlled--love the burnished, shining gold.
Just when I was wishing for a better view of the towers center stage in the panorama, here it is, painted exquisitely on an antique canvas! It's hard to believe that this is present and not past.