Okay I'll offer some C&C
Concerning perspective, probably about 99.44% of all photographs are taken with the camera at a height of around 4-5 ft. It is possible to get excellent results from this height, and working from ordinary perspectives isn't an automatic disqualification. But... I'd suggest rethinking that a bit. One of the things that people expect in an effective photograph is that it take them somewhere they haven't been (even if the subject is familiar). This unusual perspective can be literal and/or figurative.... it is simply fresh insight into the subject.
N.b. I am
not saying that shooting this from 2 ft or 20 ft would automatically improve it, I am just saying that it'd be different from expectation... and that's already something to consider.
Overall, there has to be something that hooks the viewer and makes them want to invest some more of their time in the scene.
Notice how people commented on the unusual blue colour, which is quite special. That is arguably
the strongest compositional element here. The arches are wonderful, but... also quite familiar and found in almost any cathedral. Likewise the careful centering. But... the colour seems to be the thing that is unexpected and special.